#include <bits/stdc++.h>
using namespace std;
#define int long long
string f(int n){
    string s = to_string(n);
    reverse(s.begin(),s.end());
    while(s.size() != 3) s += '0';
    reverse(s.begin(),s.end());
    return s;
}
signed main(){
    for(int i=0;i<1000;i++){
        cout<<f(i)<<endl;
        string s;
        cin>>s;
        if(s[0] == 'u') break;
    }
}