#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(){

    srand(time(NULL));

    bool f[10]={};
    char  d[10]={};
    while(true){
        string out;
        for(int i=0;i<10;i++){
            if(f[i]) out=d[i]+out;
            else out=(char)('0'+rand()%10)+out;
        }
        
        cout<<out<<endl;
        cout.flush();
        
        int x;
        string res;
        cin>>x>>res;
        
        if(res[0]=='u') return 0;
        
        string test=out;
        for(int i=0;i<10;i++){
            if(f[i]) continue;
            
           string test=out;
           test[i]='0'+rand()%10;
           cout<<test<<endl;
           cout.flush();
           
           int y;
           string test_res;
           cin>>y>>test_res;
           if(test_res[0]=='u') return 0;
           
           if(x>y){
               f[i]=true; d[i]=out[i];
           }else if(x<y){
               f[i]=true; d[i]=test[i];
           }
           
        }
        
    }

    return 0;

}