#pragma GCC optimize("Ofast","unroll-loops","omit-frame-pointer","inline")
#pragma GCC option("arch=native","tune=native","no-zero-upper")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
#pragma GCC optimize(3)
#include<bits/stdc++.h>
#define N 20010
#define rep(i,l,r) for(int i=l;i<=r;i++)
#define drep(i,r,l) for(int i=r;i>=l;i--)
using namespace std;
int rd() {
	int res=0,f=1;char ch=getchar();
	while(ch<'0'||ch>'9') {if(ch=='-') f*=-1;ch=getchar();}
	while(ch>='0'&&ch<='9') res=(res<<1)+(res<<3)+(ch^48),ch=getchar();
	return res*f;
}
int a[N];
bool check(int now) {
	rep(i,1,now/6) {
		rep(j,1,5) if(a[i]!=a[i+j*now/6]) return 0;
	}
	return 1;
}
bool Check(int now) {
	rep(i,1,now/2) {
		rep(j,1,1) if(a[i]!=a[i+j*now/2]) return 0;
	}
	return 1;
}
void Flip() {
	printf("? flip\n");
	fflush(stdout);
}
void Right() {
	printf("? right\n");
	fflush(stdout);
}
void Left() {
	printf("? left\n");
	fflush(stdout);
}
int main() {
	srand(time(NULL));
	a[1]=rd();
	rep(i,1,30) {
		if(rand()&1) {
			Flip();
			a[i]=rd();
		}
		Right();
		a[i+1]=rd();
	}
	drep(i,30,1) Left(),a[i]=rd();
	
	rep(i,2,180) {
		Right();
		a[i]=rd();
		if(i%6==0&&i>=18&&check(i)) {
			printf("! %d\n",i/6);
			fflush(stdout);
			return 0;
		}
	}
drep(i,180,2) Left(),a[i-1]=rd();
	int now=1;
	while(1) {
		Right(),a[++now]=rd();
		if((now>=2*30)&&!(now&1)&&Check(now)) {
			printf("! %d\n",now/2);
			fflush(stdout);
			return 0;
		}
	}
	return 0;
}