#include <bits/stdc++.h>

using namespace std;
using LL = long long;
using ULL = unsigned long long;
using VI = vector<int>;
using VL = vector<LL>;
using PII = pair<int, int>;
using PLL = pair<LL, LL>;
using ld = long double;

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define MP make_pair
#define PB push_back
#define EB emplace_back
#define F first
#define S second
#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 FILL(a, b) memset(a, b, sizeof(a))

int hs = 447477;
int val = hs;
const int len = 20;

void check(int x)
{
	int a = 0;
	FOR (i, 0, x) 
	{
		cout << "? left" << endl;
		cin >> a;
	}
	if (a == 0)
	{
		cout << "! " << x << endl;
		exit(0);
	}
	FOR (i, 0, x)
	{
		cout << "? right" << endl;
		cin >> a;
	}
}

void build()
{
	int x;
	cin >> x;
	if (x == 0) cout << "? flip" << endl;
	cout << "? right" << endl;
	FOR (i, 1, len)
	{
		cin >> x;
		if (x == 1)
		{
			cout << "? flip" << endl;
			cin >> x;
			check(i);
		}
		if ((hs >> i) & 1) 
		{
			cout << "? flip" << endl;
			cin >> x;
		}
		cout << "? right" << endl;	
	}
}

VI v;

bool bad()
{
	if (SZ(v) == 1) return true;
	if (SZ(v) % 2 == 0) return true;
	int l = v.back() - v[0];
	if (l & 1) return true;
	l /= 2;
	FOR (i, 0, SZ(v) / 2)
	{
		if (v[i] + l != v[i + SZ(v) / 2]) return true;
	}
	cout << "! " << l << endl;
	exit(0);
	return false;
}

void solve()
{
	build();
	v.PB(len - 1);
	int idx = len;
	int x;
	while (bad())
	{
		cin >> x;
		val >>= 1;
		val += x << (len - 1);
		if (val == hs)
			v.PB(idx);
		idx++;
		cout << "? right" << endl;
	}
}

int main()
{
	//ios_base::sync_with_stdio(0);
	//cin.tie(0);
	int t = 1;
	//cin >> t;
	while (t--)
	{
		solve();
	}
}