//A tree without skin will surely die.
//A man without face is invincible.
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#include <bits/stdc++.h>

#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(S) ((int)S.size())
#define FOR(i, st_, n) for(int i = st_; i < n; ++i)
#define RFOR(i, n, end_) for(int i = (n)-1; i >= end_; --i)
#define x first
#define y second
#define pb push_back
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef pair<double, double> pdd;
typedef unsigned long long ull;
typedef long double LD;
typedef pair<ull, ull> pull;
using namespace __gnu_pbds;
typedef tree<ll, null_type, less<>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;
using namespace std;
#ifdef ONPC
mt19937 rnd(228);
#else
mt19937 rnd(chrono::high_resolution_clock::now().time_since_epoch().count());
#endif


string guess(const string& val)
{
	cout<<val<<endl;
	string resp;
	cin>>resp;
	return resp;
}

vector<char> V;
char to_dig(int num)
{
	return V[num];
}

int solve()
{
	FOR(i,0,10)V.pb(char('0'+i));
	FOR(i,'A','Z'+1)V.pb(char(i));
	FOR(i,'a','z'+1)V.pb(char(i));
	int B, T;
	cin >> B >> T;
	FOR(_,0,T)
	{
		int D;
		cin >> D;
		vector<int> L(D,0);
		vector<int> R(D,B-1);
		vector<int> M(D,-1);
		while(true)
		{
			FOR(i,0,D)
			{
				M[i]=(L[i]+R[i])/2;
			}
			string query;
			FOR(i,0,D)query += to_dig(M[i]);
			string resp = guess(query);
			if(resp != "correct" && L==R)
			{
				cout<<"cheater"<<endl;
				break;
			}
			else if(resp=="correct")
			{
				break;
			}
			else
			{
				bool lie=false;
				FOR(i,0,D)
				{
					if(L[i]==R[i] && resp[i]!='=')
					{
						lie=true;
					}
					if(resp[i]=='+')
					{
						L[i]=M[i]+1;
					}
					else if(resp[i]=='-')
					{
						R[i]=M[i]-1;
					}
					else
					{
						L[i]=R[i]=M[i];
					}
					if((L[i]==B) || L[i] > R[i]) lie=true;
				}
				if(lie)
				{
					cout<<"cheater"<<endl;
					break;
				}
			}
		}
	}
    return 1;
}

int32_t main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    int TET = 1e9;
    //cin >> TET;
    for (int i = 1; i <= TET; i++)
    {
        if (solve())
        {
            break;
        }
#ifdef ONPC
        cout << "__________________________" << endl;
#endif
    }
#ifdef ONPC
    cerr << endl << "finished in " << clock() * 1.0 / CLOCKS_PER_SEC << " sec" << endl;
#endif
}