#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);

	ld l=1,r=6.69897;
	int t=50;
	while (t && l<=r){
		ld m=(l+r)/2.;
		ld mid=pow(10,m);
		ld p=mid/10000000.,np=1.-p,nk=1;
		int k=0;
		while (true){
			k++;
			nk*=np;
			if (nk<0.52) break; 
		}
		cout<<"test "<<k<<endl;
		int x;
		cin>>x;
		if (x) l+=(r-l)/20;
		else r-=(r-l)/20;
		t--;
	}
	int ans=(pow(10,l)+pow(10,r))/2;
	cout<<"estimate "<<ans<<endl;
	return 0;
}