#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <sstream>
#include <map>
#include <queue>
#include <stack>

using namespace std;

int main(){


    for(char c1='0';c1<='9';c1++){
        for(char c2='0';c2='9';c2++){
            for(char c3='0';c3<='9';c3++){
                string s;
                s+=c1;
                s+=c2;
                s+=c3;
                cout<<s<<endl;
                
                string res;
                cin>>res;
                if(res[0]=='u') return 0;
            }       
        }       
    }

    return 0;

}