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

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

typedef long long ll;
typedef double db;
typedef vector<int> vi;
typedef vector<long long> vll;
typedef vector<double> vd;
typedef pair<int, int> pii;
typedef pair<long long, long long> pll;
typedef vector<pair<int, int>> vpii;
typedef vector<pair<long long, long long>> vpll;
typedef set<int> si;
typedef set<long long> sll;
typedef map<int, int> mii;
typedef map<long long, long long> mll;

constexpr int INF = 1e9 + 47;
constexpr long long LINF = (ll)1e18 + 4747;
constexpr int MOD = 998244353;
constexpr int N = 1e6 + 47;

si getRest(si& s, int n)
{
	si all;
	FOR(i, 1, n + 1)
		all.insert(i);

	for (auto it : s)
		all.erase(it);
	return all;
}

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

	string all;
	char c = 'a';
	FOR (i, 0, 26)
	{
		all += c;
		c++;
	}

	cout << "? " << all << endl;
	int n;
	cin >> n;
	FOR (i, 0, n)
	{
		int x;
		cin >> x;
	}

	vector<string> bits(5);
	for (char ch = 'a'; ch < 'z'; ch++)
	{
		int num = ch - 'a' + 1;
		FOR (i, 0, 5)
		{
			if (num & 1 << i)
				bits[i] += ch;
		}
	}

	vector<si> resp(5);
	vector<si> opp(5);
	FOR (i, 0, 5)
	{
		cout << "? " << bits[i] << endl;
		int num;
		cin >> num;
		FOR (j, 0, num)
		{
			int x;
			cin >> x;
			resp[i].insert(x);
		}
		opp[i] = getRest(resp[i], n);
	}

	vector<char> res(n);
	FOR (i, 1, 26)
	{
		si pos = 1 & i ? resp[0] : opp[0];
		FOR (j, 1, 5)
		{
			if (i & 1 << j)
			{
				si t;
				set_intersection(ALL(pos), ALL(resp[j]), inserter(t, t.begin()));
				pos = t;
			}
			else
			{
				si t;
				set_intersection(ALL(pos), ALL(opp[j]), inserter(t, t.begin()));
				pos = t;
			}
		}
		for (auto idx : pos)
			res[idx - 1] = (char)i + 'a' - 1;
	}

	FOR (i, 0, n)
		if (res[i] == '\0')
			res[i] = 'z';

	cout << "! ";
	FOR(i, 0, n)
		cout << res[i];

	cout << endl;

    return 0;
}