#line 1 "library/Template/template.hpp"
#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for (int i = (int)(a); i < (int)(b); i++)
#define rrep(i, a, b) for (int i = (int)(b)-1; i >= (int)(a); i--)
#define ALL(v) (v).begin(), (v).end()
#define UNIQUE(v) sort(ALL(v)), (v).erase(unique(ALL(v)), (v).end())
#define SZ(v) (int)v.size()
#define MIN(v) *min_element(ALL(v))
#define MAX(v) *max_element(ALL(v))
#define LB(v, x) int(lower_bound(ALL(v), (x)) - (v).begin())
#define UB(v, x) int(upper_bound(ALL(v), (x)) - (v).begin())

using uint = unsigned int;
using ll = long long int;
using ull = unsigned long long;
using i128 = __int128_t;
using u128 = __uint128_t;
const int inf = 0x3fffffff;
const ll INF = 0x1fffffffffffffff;

template <typename T, typename S = T> S SUM(const vector<T> &a) {
    return accumulate(ALL(a), S(0));
}
template <typename T> inline bool chmax(T &a, T b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}
template <typename T> inline bool chmin(T &a, T b) {
    if (a > b) {
        a = b;
        return 1;
    }
    return 0;
}
template <typename T, typename U> T ceil(T x, U y) {
    assert(y != 0);
    if (y < 0)
        x = -x, y = -y;
    return (x > 0 ? (x + y - 1) / y : x / y);
}
template <typename T, typename U> T floor(T x, U y) {
    assert(y != 0);
    if (y < 0)
        x = -x, y = -y;
    return (x > 0 ? x / y : (x - y + 1) / y);
}
template <typename T> int popcnt(T x) {
    return __builtin_popcountll(x);
}
template <typename T> int topbit(T x) {
    return (x == 0 ? -1 : 63 - __builtin_clzll(x));
}
template <typename T> int lowbit(T x) {
    return (x == 0 ? -1 : __builtin_ctzll(x));
}

template <class T, class U>
ostream &operator<<(ostream &os, const pair<T, U> &p) {
    os << "P(" << p.first << ", " << p.second << ")";
    return os;
}
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) {
    os << "{";
    for (int i = 0; i < vec.size(); i++) {
        os << vec[i] << (i + 1 == vec.size() ? "" : ", ");
    }
    os << "}";
    return os;
}
template <typename T, typename U>
ostream &operator<<(ostream &os, const map<T, U> &map_var) {
    os << "{";
    for (auto itr = map_var.begin(); itr != map_var.end(); itr++) {
        os << "(" << itr->first << ", " << itr->second << ")";
        itr++;
        if (itr != map_var.end())
            os << ", ";
        itr--;
    }
    os << "}";
    return os;
}
template <typename T> ostream &operator<<(ostream &os, const set<T> &set_var) {
    os << "{";
    for (auto itr = set_var.begin(); itr != set_var.end(); itr++) {
        os << *itr;
        ++itr;
        if (itr != set_var.end())
            os << ", ";
        itr--;
    }
    os << "}";
    return os;
}
#ifdef LOCAL
#define show(...) _show(0, #__VA_ARGS__, __VA_ARGS__)
#else
#define show(...) true
#endif
template <typename T> void _show(int i, T name) {
    cerr << '\n';
}
template <typename T1, typename T2, typename... T3>
void _show(int i, const T1 &a, const T2 &b, const T3 &...c) {
    for (; a[i] != ',' && a[i] != '\0'; i++)
        cerr << a[i];
    cerr << ":" << b << " ";
    _show(i + 1, a, c...);
}
#line 2 "sol.cpp"
// #include "Utility/fastio.hpp"

#line 2 "library/Utility/random.hpp"

namespace Random {
mt19937_64 randgen(chrono::steady_clock::now().time_since_epoch().count());
using u64 = unsigned long long;
u64 get() {
    return randgen();
}
template <typename T> T get(T L) { // [0,L]
    return get() % (L + 1);
}
template <typename T> T get(T L, T R) { // [L,R]
    return get(R - L) + L;
}
double uniform() {
    return double(get(1000000000)) / 1000000000;
}
string str(int n) {
    string ret;
    rep(i, 0, n) ret += get('a', 'z');
    return ret;
}
template <typename Iter> void shuffle(Iter first, Iter last) {
    if (first == last)
        return;
    int len = 1;
    for (auto it = first + 1; it != last; it++) {
        len++;
        int j = get(0, len - 1);
        if (j != len - 1)
            iter_swap(it, first + j);
    }
}
template <typename T> vector<T> select(int n, T L, T R) { // [L,R]
    if (n * 2 >= R - L + 1) {
        vector<T> ret(R - L + 1);
        iota(ALL(ret), L);
        shuffle(ALL(ret));
        ret.resize(n);
        return ret;
    } else {
        unordered_set<T> used;
        vector<T> ret;
        while (SZ(used) < n) {
            T x = get(L, R);
            if (!used.count(x)) {
                used.insert(x);
                ret.push_back(x);
            }
        }
        return ret;
    }
}

void relabel(int n, vector<pair<int, int>> &es) {
    shuffle(ALL(es));
    vector<int> ord(n);
    iota(ALL(ord), 0);
    shuffle(ALL(ord));
    for (auto &[u, v] : es)
        u = ord[u], v = ord[v];
}
template <bool directed, bool simple> vector<pair<int, int>> genGraph(int n) {
    vector<pair<int, int>> cand, es;
    rep(u, 0, n) rep(v, 0, n) {
        if (simple and u == v)
            continue;
        if (!directed and u > v)
            continue;
        cand.push_back({u, v});
    }
    int m = get(SZ(cand));
    vector<int> ord;
    if (simple)
        ord = select(m, 0, SZ(cand) - 1);
    else {
        rep(_, 0, m) ord.push_back(get(SZ(cand) - 1));
    }
    for (auto &i : ord)
        es.push_back(cand[i]);
    relabel(n, es);
    return es;
}
vector<pair<int, int>> genTree(int n) {
    vector<pair<int, int>> es;
    rep(i, 1, n) es.push_back({get(i - 1), i});
    relabel(n, es);
    return es;
}
}; // namespace Random

/**
 * @brief Random
 */
#line 2 "library/Math/miller.hpp"

struct m64 {
    using i64 = int64_t;
    using u64 = uint64_t;
    using u128 = __uint128_t;

    static u64 mod;
    static u64 r;
    static u64 n2;

    static u64 get_r() {
        u64 ret = mod;
        rep(_,0,5) ret *= 2 - mod * ret;
        return ret;
    }

    static void set_mod(u64 m) {
        assert(m < (1LL << 62));
        assert((m & 1) == 1);
        mod = m;
        n2 = -u128(m) % m;
        r = get_r();
        assert(r * mod == 1);
    }
    static u64 get_mod() { return mod; }

    u64 a;
    m64() : a(0) {}
    m64(const int64_t &b) : a(reduce((u128(b) + mod) * n2)){};

    static u64 reduce(const u128 &b) {
        return (b + u128(u64(b) * u64(-r)) * mod) >> 64;
    }
    u64 get() const {
        u64 ret = reduce(a);
        return ret >= mod ? ret - mod : ret;
    }
    m64 &operator*=(const m64 &b) {
        a = reduce(u128(a) * b.a);
        return *this;
    }
    m64 operator*(const m64 &b) const { return m64(*this) *= b; }
    bool operator==(const m64 &b) const {
        return (a >= mod ? a - mod : a) == (b.a >= mod ? b.a - mod : b.a);
    }
    bool operator!=(const m64 &b) const {
        return (a >= mod ? a - mod : a) != (b.a >= mod ? b.a - mod : b.a);
    }
    m64 pow(u128 n) const {
        m64 ret(1), mul(*this);
        while (n > 0) {
        if (n & 1) ret *= mul;
        mul *= mul;
        n >>= 1;
        }
        return ret;
    }
};
typename m64::u64 m64::mod, m64::r, m64::n2;

bool Miller(ll n){
    if(n<2 or (n&1)==0)return (n==2);
    m64::set_mod(n);
    ll d=n-1; while((d&1)==0)d>>=1;
    vector<ll> seeds;
    if(n<(1<<30))seeds={2, 7, 61};
    else seeds={2, 325, 9375, 28178, 450775, 9780504};
    for(auto& x:seeds){
        if(n<=x)break;
        ll t=d;
        m64 y=m64(x).pow(t);
        while(t!=n-1 and y!=1 and y!=n-1){
            y*=y;
            t<<=1;
        }
        if(y!=n-1 and (t&1)==0)return 0;
    } return 1;
}

/**
 * @brief Miller-Rabin
 */
#line 2 "library/Math/fastdiv.hpp"

struct FastDiv {
    using u64 = uint64_t;
    using u128 = __uint128_t;
    constexpr FastDiv() : m(), s(), x() {}
    constexpr FastDiv(int _m)
        : m(_m), s(__lg(m - 1)), x(((u128(1) << (s + 64)) + m - 1) / m) {}
    constexpr int get() {
        return m;
    }
    constexpr friend u64 operator/(u64 n, const FastDiv &d) {
        return (u128(n) * d.x >> d.s) >> 64;
    }
    constexpr friend int operator%(u64 n, const FastDiv &d) {
        return n - n / d * d.m;
    }
    constexpr pair<u64, int> divmod(u64 n) const {
        u64 q = n / (*this);
        return {q, n - q * m};
    }
    int m, s;
    u64 x;
};

struct FastDiv64 {
    using u64 = uint64_t;
    using u128 = __uint128_t;
    u128 mod, mh, ml;
    explicit FastDiv64(u64 mod = 1) : mod(mod) {
        u128 m = u128(-1) / mod;
        if (m * mod + mod == u128(0))
            ++m;
        mh = m >> 64;
        ml = m & u64(-1);
    }
    u64 umod() const {
        return mod;
    }
    u64 modulo(u128 x) {
        u128 z = (x & u64(-1)) * ml;
        z = (x & u64(-1)) * mh + (x >> 64) * ml + (z >> 64);
        z = (x >> 64) * mh + (z >> 64);
        x -= z * mod;
        return x < mod ? x : x - mod;
    }
    u64 mul(u64 a, u64 b) {
        return modulo(u128(a) * b);
    }
};

/**
 * @brief Fast Division
 */
#line 4 "library/Math/pollard.hpp"

vector<ll> Pollard(ll n) {
    if (n <= 1)
        return {};
    if (Miller(n))
        return {n};
    if ((n & 1) == 0) {
        vector<ll> v = Pollard(n >> 1);
        v.push_back(2);
        return v;
    }
    for (ll x = 2, y = 2, d;;) {
        ll c = Random::get(2LL, n - 1);
        do {
            x = (__int128_t(x) * x + c) % n;
            y = (__int128_t(y) * y + c) % n;
            y = (__int128_t(y) * y + c) % n;
            d = __gcd(x - y + n, n);
        } while (d == 1);
        if (d < n) {
            vector<ll> lb = Pollard(d), rb = Pollard(n / d);
            lb.insert(lb.end(), ALL(rb));
            return lb;
        }
    }
}

/**
 * @brief Pollard-Rho
 */
#line 4 "library/Math/primitive.hpp"

ll mpow(ll a, ll t, ll m) {
    ll res = 1;
    FastDiv64 im(m);
    while (t) {
        if (t & 1)
            res = im.modulo(__int128_t(res) * a);
        a = im.modulo(__int128_t(a) * a);
        t >>= 1;
    }
    return res;
}
ll minv(ll a, ll m) {
    ll b = m, u = 1, v = 0;
    while (b) {
        ll t = a / b;
        a -= t * b;
        swap(a, b);
        u -= t * v;
        swap(u, v);
    }
    u = (u % m + m) % m;
    return u;
}
ll getPrimitiveRoot(ll p) {
    vector<ll> ps = Pollard(p - 1);
    sort(ALL(ps));
    rep(x, 1, inf) {
        for (auto &q : ps) {
            if (mpow(x, (p - 1) / q, p) == 1)
                goto fail;
        }
        return x;
    fail:;
    }
    assert(0);
}
ll extgcd(ll a, ll b, ll &p, ll &q) {
    if (b == 0) {
        p = 1;
        q = 0;
        return a;
    }
    ll d = extgcd(b, a % b, q, p);
    q -= a / b * p;
    return d;
}
pair<ll, ll> crt(const vector<ll> &vs, const vector<ll> &ms) {
    ll V = vs[0], M = ms[0];
    rep(i, 1, vs.size()) {
        ll p, q, v = vs[i], m = ms[i];
        if (M < m)
            swap(M, m), swap(V, v);
        ll d = extgcd(M, m, p, q);
        if ((v - V) % d != 0)
            return {0, -1};
        ll md = m / d, tmp = (v - V) / d % md * p % md;
        V += M * tmp;
        M *= md;
    }
    V = (V % M + M) % M;
    return {V, M};
}
ll ModLog(ll a, ll b, ll p) {
    ll g = 1;
    for (ll t = p; t; t >>= 1)
        g = g * a % p;
    g = __gcd(g, p);
    ll t = 1, c = 0;
    for (; t % g; c++) {
        if (t == b)
            return c;
        t = t * a % p;
    }
    if (b % g)
        return -1;
    t /= g, b /= g;
    ll n = p / g, h = 0, gs = 1;
    for (; h * h < n; h++)
        gs = gs * a % n;
    unordered_map<ll, ll> bs;
    for (ll s = 0, e = b; s < h; bs[e] = ++s)
        e = e * a % n;
    for (ll s = 0, e = t; s < n;) {
        e = e * gs % n, s += h;
        if (bs.count(e)) {
            return c + s - bs[e];
        }
    }
    return -1;
}

ll mod_root(ll k, ll a, ll m) {
    if (a == 0)
        return k ? 0 : -1;
    if (m == 2)
        return a & 1;
    k %= m - 1;
    ll g = gcd(k, m - 1);
    if (mpow(a, (m - 1) / g, m) != 1)
        return -1;
    a = mpow(a, minv(k / g, (m - 1) / g), m);
    FastDiv im(m);

    auto _subroot = [&](ll p, int e, ll a) -> ll { // x^(p^e)==a(mod m)
        ll q = m - 1;
        int s = 0;
        while (q % p == 0) {
            q /= p;
            s++;
        }
        int d = s - e;
        ll pe = mpow(p, e, m),
           res = mpow(a, ((pe - 1) * minv(q, pe) % pe * q + 1) / pe, m), c = 1;
        while (mpow(c, (m - 1) / p, m) == 1)
            c++;
        c = mpow(c, q, m);
        map<ll, ll> mp;
        ll v = 1, block = sqrt(d * p) + 1,
           bs = mpow(c, mpow(p, s - 1, m - 1) * block % (m - 1), m);
        rep(i, 0, block + 1) mp[v] = i, v = v * bs % im;
        ll gs = minv(mpow(c, mpow(p, s - 1, m - 1), m), m);
        rep(i, 0, d) {
            ll err = a * minv(mpow(res, pe, m), m) % im;
            ll pos = mpow(err, mpow(p, d - 1 - i, m - 1), m);
            rep(j, 0, block + 1) {
                if (mp.count(pos)) {
                    res = res *
                          mpow(c,
                               (block * mp[pos] + j) * mpow(p, i, m - 1) %
                                   (m - 1),
                               m) %
                          im;
                    break;
                }
                pos = pos * gs % im;
            }
        }
        return res;
    };

    for (ll d = 2; d * d <= g; d++)
        if (g % d == 0) {
            int sz = 0;
            while (g % d == 0) {
                g /= d;
                sz++;
            }
            a = _subroot(d, sz, a);
        }
    if (g > 1)
        a = _subroot(g, 1, a);
    return a;
}

ull floor_root(ull a, ull k) {
    if (a <= 1 or k == 1)
        return a;
    if (k >= 64)
        return 1;
    if (k == 2)
        return sqrtl(a);
    constexpr ull LIM = -1;
    if (a == LIM)
        a--;
    auto mul = [&](ull &x, const ull &y) {
        if (x <= LIM / y)
            x *= y;
        else
            x = LIM;
    };
    auto pw = [&](ull x, ull t) -> ull {
        ull y = 1;
        while (t) {
            if (t & 1)
                mul(y, x);
            mul(x, x);
            t >>= 1;
        }
        return y;
    };
    ull ret = (k == 3 ? cbrt(a) - 1 : pow(a, nextafter(1 / double(k), 0)));
    while (pw(ret + 1, k) <= a)
        ret++;
    return ret;
}

/**
 * @brief Primitive Function
 */
#line 7 "sol.cpp"
vector<ll> qs = {2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 37, 41, 43, 47, 53};
ll god;
int query = 0;
bool ask(ll x) {
    query++;
    cout << "? " << x << endl;

    // return Miller(x + god);

    string s;
    cin >> s;
    assert(s[0] != 'B');
    return s[0] == 'P';
}

int main() {
    int T;
    cin >> T;
    rep(test, 0, T) {
        god = Random::get(1000000000000000000LL);

        vector<ll> md;
        vector cand(SZ(qs), vector<int>());
        rep(i, 0, SZ(qs)) cand[i].resize(qs[i], 1);

        rep(i, 0, SZ(qs)) {
            int q = qs[i];
            int rem = 0;
            rep(x, 0, q) if (cand[i][x]) {
                rem++;
            }
            while (rem != 1) {
                rep(r, 0, q) if (cand[i][r]) {
                    ll y;
                    for (;;) {
                        vector<ll> nmd;
                        vector<ll> nq;
                        rep(j, 0, SZ(qs)) {
                            nq.push_back(qs[j]);
                            if (qs[j] == q) {
                                nmd.push_back((q - r) % q);
                            } else if (qs[j] < q) {
                                for (;;) {
                                    int s = Random::get(qs[j] - 1);
                                    if ((s + md[j]) % qs[j] == 0)
                                        continue;
                                    nmd.push_back(s);
                                    break;
                                }
                            } else {
                                for (;;) {
                                    int s = Random::get(qs[j] - 1);
                                    if (!cand[j][(qs[j] - s) % qs[j]])
                                        continue;
                                    nmd.push_back(s);
                                    break;
                                }
                            }
                        }
                        auto [R, M] = crt(nmd, nq);
                        if (R >= 1 and R <= 1000000000000000000LL) {
                            y = R;
                            break;
                        }
                    }
                    if (ask(y)) {
                        rep(j, i, SZ(qs)) {
                            cand[j][(qs[j] - y % qs[j]) % qs[j]] = 0;
                        }
                        rem--;
                    }
                }
            }
            assert(rem == 1);
            rep(r, 0, q) if (cand[i][r]) {
                md.push_back(r);
                break;
            }
        }
        auto [ret, M] = crt(md, qs);
        cout << "! " << ret << endl;

        // show(query);
        // if (query > 8750 or god != ret) {
        //     show(god, ret);
        //     return 0;
        // }

        string _;
        cin >> _;
        assert(_ == "Correct");
    }
    return 0;
}