#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    string s(10, '0');
    for(int i=0; ; ++i){
        int prev = -1;
        for(char c='0'; ; ++c){
            s[i] = c;
            cout << s << endl;

            int curr;
            string t;
            cin >> curr >> t;
            if(t == "unlocked")
                return 0;

            if(c == '0'){
                prev = curr;
            }
            else if(curr != prev){
                if(curr < prev)
                    s[i] = '0';
                break;
            }
        }
    }
}