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

  return 0;
}