#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

extern char **environ;
char *http="HTTP_";
char *remote="REMOTE_";
char *req="REQUEST_";

int main (int argc, char *argv[]){
 int i, httpl, remotel, reql;
 httpl=strlen(http);
 remotel=strlen(remote);
 reql=strlen(req);
 puts("Content-type: text/plain\n");
 for (i=0; i< 99; i++){
  if (environ[i]==NULL) break;
  if (strncmp(http, environ[i], httpl)==0 ||
   strncmp(req, environ[i], reql)==0 ||
   strncmp(remote, environ[i], remotel)==0){
   puts(environ[i]);
  }
 }
 return 0;
}