#include <stdio.h>

void run(void) {
    char lock[4];
    char line[10];

    lock[3] = '\0';
    line[8] = '0';

    for (lock[0] = '0'; lock[0] <= '9'; lock[0]++) {
        for (lock[1] = '0'; lock[1] <= '9'; lock[1]++) {
            for (lock[2] = '0'; lock[2] <= '9'; lock[2]++) {
                printf("%s\n", lock);
                scanf("%s", line);
                if (line[0] == 'u') {
                    return;
                }
            }
        }
    }
}

int main(void) {
    run();
    return 0;
}