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

#define REP(i,a,b) for(int i=(a),i##_end_=(b);i<i##_end_;++i)
#define INF 0x3f3f3f3f

#define CHECKTIME 50
#define KEYLENGTH 30

static const int M=10003;

int c,A[M],B[M];
bool Work1(){
	REP(i,0,CHECKTIME){
		if(c==0)puts("? flip"),--i;
		else puts("? right");
		fflush(stdout);
		scanf("%d",&c);
	}
	REP(i,0,CHECKTIME){
		if(c==1)puts("? right");
		else return 0;
		fflush(stdout);
		scanf("%d",&c);
	}
	REP(i,0,CHECKTIME){
		if(c==1)puts("? flip"),--i;
		else puts("? left");
		fflush(stdout);
		scanf("%d",&c);
	}
	REP(i,0,CHECKTIME){
		if(c==0)puts("? left");
		else return 0;
		fflush(stdout);
		scanf("%d",&c);
	}
	puts("? flip");
	fflush(stdout);
	scanf("%d",&c);
	
	puts("? left");
	fflush(stdout);
	scanf("%d",&c);
	
	int t=1;
	REP(i,0,CHECKTIME){
		if(c==0)puts("? left"),t++;
		else{
			printf("! %d\n",t);
			return 1;
		}
		fflush(stdout);
		scanf("%d",&c);
	}
	return 0;
}
bool Chk(int x){
	if(x<0)return 0;
	REP(i,0,KEYLENGTH)
		if(A[i]!=B[x+i])return 0;
	return 1;
}
int main(){
	scanf("%d",&c);
	if(Work1())return 0;
	
	srand(time(NULL));
	REP(i,0,KEYLENGTH)
		A[i]=rand()&1;
	
	REP(i,0,KEYLENGTH){
		if(c==A[i])puts("? left");
		else puts("? flip"),--i;
		fflush(stdout);
		scanf("%d",&c);
	}
	int m=0;
	while(1){
		B[m++]=c;
		if(Chk(m-KEYLENGTH)){
			printf("! %d\n",m);
			return 0;
		}
		if(rand()&1){
			puts("? flip");
			fflush(stdout);
			scanf("%d",&c);
		}
		puts("? left");
		fflush(stdout);
		scanf("%d",&c);
	}
	
	return 0;
}