#include <bits/stdc++.h>
using namespace std;

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define FOR(i, a, b) for (int i = (a); i<(b); ++i)
#define RFOR(i, b, a) for (int i = (b)-1; i>=(a); --i)
#define MP make_pair
#define PB push_back
#define F first
#define S second

typedef long long LL;
typedef pair<int, int> PII;
typedef vector<int> VI;

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	const int n = 1e4 + 47;
	vector<int> v(n);
	int mx = 0;
	FOR(i, 0, 5)
	{
		cout << "? ";
		FOR(j, 1, 27)
		{
			if (j & (1 << i))
				cout << char('a' + j - 1);
		}
		cout << endl;
		int sz;
		cin >> sz;
		FOR(j, 0, sz)
		{
			int x;
			cin >> x;
			mx = max(mx, x);
			x--;
			v[x] |= 1 << i;
		}
	}
	cout << "! ";
	FOR (i, 0, mx)
	{
		cout << char('a' + v[i] - 1);
	}
	cout << endl;
	
	return 0;
}