#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <math.h>
using namespace std;
typedef unsigned int uint;
typedef unsigned long ulong;

int main() {
    ulong answer = 0;
    ulong targetmask = 1;
    ulong responce1 = 0;
    string responce2;
    ulong lastnumber = -1;

    while (true) {
        printf("%010d\n", answer);
        cin >> responce1 >> responce2;
        if (responce2 == "unlocked") {
            return 0;
        }
        else {
            if (lastnumber == -1) lastnumber = responce1;
            if (responce1 < lastnumber) {
                answer -= targetmask;
                targetmask *= 10;
                lastnumber = responce1 + 1;
            }
            else if (responce1 > lastnumber) {
                targetmask *= 10;
                lastnumber = responce1;
            }
            else {
                lastnumber = responce1;
                answer += targetmask;
            }
        }
    }

    return 0;
}