#include<bits/stdc++.h>
using namespace std;
mt19937 rnd(1128);
const int lim=50;
int s;
string sta,cur;
int main(){
    int i,j;
    cin>>s;
    for(i=1;i<=lim;i++){
        if(s==1){
            cout<<"? flip"<<endl;
            cin>>s;
        }
        cout<<"? right"<<endl;
        cin>>s;
    }
    if(s==0){
        cout<<"? flip"<<endl;
        cin>>s;
    }
    for(i=1;i<=lim;i++){
        cout<<"? right"<<endl;
        cin>>s;
        if(s)
            break;
        if (i == lim) goto loop;
    }
    cout<<"? flip"<<endl;
    cin>>s;
    for(j=1;j<=i;j++){
        cout<<"? left"<<endl;
        cin>>s;
    }
    if(s==0){
        cout<<"! "<<i<<endl;
        return 0;
    }

    loop:for(i=1;i<=lim;i++){
        if(rnd()%2==1){
            cout<<"? flip"<<endl;
            cin>>s;
        }
        sta+=s+'0';
        cout<<"? right"<<endl;
        cin>>s;
    }
    cur=sta;
    for(i=1;;i++){
        cur.erase(0,1);
        cur+=s+'0';
        if(cur==sta)
            break;
        cout<<"? right"<<endl;
        cin>>s;
    }
    cout<<"! "<<i<<endl;
    return 0;
}