//   __________________
//  | ________________ |
//  ||          ____  ||
//  ||   /\    |      ||
//  ||  /__\   |      ||
//  || /    \  |____  ||
//  ||________________||
//  |__________________|
//  \###################\
//   \###################\
//    \        ____       \
//     \_______\___\_______\
// An AC a day keeps the doctor away.
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
#include <bits/stdc++.h>
#define hutao_my_wife ios_base::sync_with_stdio(0);
#define forcalors_so_cute cin.tie(0);
/*

struct A {
	public: [[nodiscard]] virtual const unsigned long long reference operator bitor (const unsigned long long reference a) const noexcept;

};

struct B: public A{

	public: [[nodiscard]] virtual const unsigned long long reference operator bitor (const unsigned long long reference a) const noexcept override final {

	
	}

};

inline char readchar() noexcept {
    static char buffer[BUFSIZ], * now = buffer + BUFSIZ, * end = buffer + BUFSIZ;
    if (now == end)
    {
        if (end < buffer + BUFSIZ)
            return EOF;
        end = (buffer + fread(buffer, 1, BUFSIZ, stdin));
        now = buffer;
    }
    return *now++;
}
inline int nextint() noexcept {
    int x = 0, c = readchar(), neg = 0;
    while(('0' > c || c > '9') && c!='-' && c!=EOF) c = readchar();
    if(c == '-') neg = true, c = readchar();
    while('0' <= c && c <= '9') x = (x<<3) + (x<<1) + (c^'0'), c = readchar();
    if(neg) x = -x;
    return x; // returns 0 if EOF
}

//fast io cin>>a 改成 a = nextint();
*/
#define ll long long
//#define int long long
#define pii pair<int,int>
#define ff first
#define ss second
#define pb push_back
#define eb emplace_back
#define ALL(v) v.begin(), v.end()
#define bug(A) cout<<A<<" hi\n";
using namespace std;

const ll M = 200005;
set<char> deal(int x){
    set<char> s;
    for(int i = 0; i < 32;){
        for(int j = 0; j < x/2 && i+j <32; j++){
            s.insert('a' + i+j);
           // cout<<i <<' '<<j<<'\n';
        }
        i+=x;
    }
    return s;
}
set<int>st[32][2];
void solve(){
    
    int now = 32, pos = 0;
    for(int i = 0; i < 32; i++){
        for(int j = 1; j <= 10000; j++)
        st[i][1].insert(j);
    }
    
    while(now>1){
        for(int i = 0; i < 32; i++)st[i][pos].clear();
        set<char>tmp = deal(now);
        set<int>r;
        cout<<"? ";
        for(auto i:tmp){
            if(i < 'a' + 26)
            cout<<i;
        }
        cout<<endl;
        int n;
        cin>>n;
        for(int i = 0; i < n; i++){
            int c;
            cin>>c;
            r.insert(c);
        }

        for(int i = 0; i < 32; i++){
            if(tmp.count(i+'a')){
                for(char it:st[i][(pos^1)]){
                    if(r.count(it))st[i][pos].insert(it);
                }
            }
            else{
                for(char it:st[i][(pos^1)]){
                    if(!r.count(it))st[i][pos].insert(it);
                }
            }
        }
        //for(auto it:st[0][0])cout<<it<<' ';cout<<endl;
        pos^=1;
        now/=2;
    }
    vector<char>ans(10005,0);
    pos^=1;
    for(int i = 0; i < 26; i++){
        for(auto it:st[i][pos]){
            //cout<<(char)('a' + i)<<' ' <<it<<'\n';
            ans[it] = 'a' + i;
        }
    }
    cout<<"! ";
    for(int i = 1; i <= 10004; i++){
        if(ans[i] == 0)break;
        cout<<ans[i];
    }
    cout<<endl;
    
}

signed main(){
//
    hutao_my_wife    forcalors_so_cute

    int t = 1;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}