#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include <math.h>
int main(void)
{
    char ans[4]="";
    scanf("%s",&ans);
    for(int i=0;i<1000;i++)
    {
        char lockorunlock[10]="";
        scanf("%s",lockorunlock);
        if(strcmp(lockorunlock,"unlock")==0)
        {
            printf("%03d\n",i);
            goto loopend;
        }
        printf("%03d\n",i);
    }      
    loopend:
    return 0;
}