#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <stdlib.h>


int main (int index, char** in_data){
     
fprintf(stdout, "%d\n",fileno(stdout));
fprintf(stdout, "%d\n",fileno(stdin));
fprintf(stdout, "%d\n",fileno(stderr));
     
     
     return 0;
}