#include<stdio.h>
#include<string.h>
int main(void){
	int i=0;
	char a[10];
	printf("000\n");
	scanf("%s",a);
	while(strcmp(a,"unlocked") != 0){
		i++;
		if(i<10){
			printf("00");
		}else if(i<100){
			printf("0");
		}
		printf("%d\n",i);
		scanf("%s",a);
	}
	return 0;
}