#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pii;
typedef pair<ll, ll> pll;
#define pb push_back
#define el << '\n'
#define spe << ' '
#define sp spe <<
#define umap unordered_map
#define uset unordered_set
#define prqu priority_queue
#define fornr(i, j, n) for (ll i = j; i < n; i++)
#define forn(i, n) for (ll i = 0; i < n; i++)
#define forn1(i, n) for (ll i = 1; i <= n; i++)
#define fornrb(i, j, n) for (ll i = n - 1; i >= j; i--)
#define fornb(i, n) for (ll i = n - 1; i >= 0; i--)
#define forn1b(i, n) for (i = n; i > 0; i--)
#define fornn(i, n) for (ll i = 1; i <= n; i++)
#define rety cout << "YES\n"; return 0;
#define retn cout << "NO\n"; return 0;
#define conty cout << "YES\n"; continue;
#define contn cout << "NO\n"; continue;
#define all(x) x.begin(), x.end()
#define mp make_pair
#define pb push_back
const ll IMX = 2e9 + 5;
const ll LMX = 4e18 + 10, MOD = 1e9 + 7, MOD2 = 998244353;

const ll MAXN = 2e5 + 5;

ll n, b[MAXN];
ll t, a[MAXN];

bool comp(ll _a, ll _b) {
    if (b[_a] != b[_b]) return b[_a] < b[_b];
    return _a < _b;
    // return a[_a] < a[_b];
}

struct cmp {
    bool operator() (ll _a, ll _b) {
        if (a[_a] != a[_b]) return a[_a] > a[_b];
        return _a < _b;
        // return b[_a] > b[_b];
    }
};

struct rev {
    bool operator() (ll _a, ll _b) {
        if (a[_a] != a[_b]) return a[_a] < a[_b];
        return _a < _b;
        //return b[_a] > b[_b];
    }
};

ll sorted[MAXN], pos[MAXN];

ll test(ll k) {
    prqu<ll, vector<ll>, rev> qk, qm;
    prqu<ll, vector<ll>, cmp> qt;
    ll m = 0;
    ll sum = 0;
    forn(i, n) {
        qt.push(i);
        pos[i] = 2;
    }
    assert(qt.size() == n);
    ll ms = 0;  // expected size of qm
    ll idx = 0;
    for (m = k; m <= n; m++, ms++) {
        if (idx == n) break;
        for (; idx < n && b[sorted[idx]] <= m; idx++) {
            ll cur = sorted[idx];
            qk.push(cur);
            if (pos[cur] == 1) ms++;
            else sum += a[cur];
            pos[cur] = 0;
        }

        while (!qm.empty() && pos[qm.top()] != 1) {
            qm.pop();
            ms--;
        }

        for (; qk.size() > k; ) {
            if (qm.size() < ms) {
                qm.push(qk.top());
                pos[qk.top()] = 1;
            } else if (!qm.empty() && a[qk.top()] < a[qm.top()]) {
                qm.push(qk.top());
                pos[qk.top()] = 1;
            } else {
                qt.push(qk.top());
                sum -= a[qk.top()];
                pos[qk.top()] = 2;
            }
            qk.pop();
        }
        while (qm.size() > ms) {
            if (pos[qm.top()] != 1) {
                qm.pop();
                ms--;
            } else {
                qt.push(qm.top());
                pos[qm.top()] = 2;
                sum -= a[qm.top()];
                qm.pop();
            }
        }

        while (!qt.empty()) {
            if (pos[qt.top()] != 2) {
                qt.pop();
                continue;
            }
            while (qm.size() && pos[qm.top()] != 1) {
                qm.pop();
                ms--;
            }
            if (!qm.empty() && a[qt.top()] < a[qm.top()]) {
                sum += a[qt.top()] - a[qm.top()];
                pos[qt.top()] = 1;
                pos[qm.top()] = 2;
                ll qm1 = qm.top(), qt1 = qt.top();
                qt.pop();
                qm.pop();
                qt.push(qm1);
                qm.push(qt1);
            } else {
                break;
            }
        }
        if (qk.size() == k && sum <= t && qm.size() == ms) {
            return m;
        }
    }
    return 0;
}

vector<ll> ret;

void getSolution(ll k, ll m) {
    prqu<ll, vector<ll>, rev> qk, qm;
    forn(i, n) {
        if (b[i] <= m) qk.push(i);
        else qm.push(i);
    }
    while (qk.size() > k) {
        qm.push(qk.top());
        qk.pop();
    }
    while (qm.size() > m - k) qm.pop();
    while (!qm.empty()) {
        ret.pb(qm.top() + 1);
        qm.pop();
    }
    while (!qk.empty()) {
        ret.pb(qk.top() + 1);
        qk.pop();
    }
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll q;
    cin >> q;
    while(q--) {
        cin >> n >> t;
        forn(i, n) {
            cin >> a[i] >> b[i];
            sorted[i] = i;
        }
        sort(sorted, sorted + n, comp);
        ll l = 0, r = n;
        ll saved = 0;
        vector<ll> vsaved(n + 1);
        while (l < r) {
            ll k = (l + r + 1) / 2, m = test(k);
            if (m) {
                l = k;
                saved = m;
                vsaved[k] = m;
            }
            else r = k - 1;
        }
        cout << l el << vsaved[l] el;
        ret.clear();
        getSolution(l, vsaved[l]);
        sort(ret.begin(), ret.end());
        forn(i, vsaved[l]) cout << ret[i] spe;
        cout el;
    }
    return 0;
}