/* -*- coding: utf-8 -*-
 *
 * 3701.cc:  No.3701 SUKEN -> SSSSS - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* main */

int main() {
  char s[128];
  scanf("%s", s);

  for (int i = 0; s[i]; i++) putchar(s[0]);
  putchar('\n');

  return 0;
}