/* -*- coding: utf-8 -*-
 *
 * 3195.cc:  No.3195 Three-Letter Acronym - yukicoder
 */

#include<cstdio>
#include<algorithm>

using namespace std;

/* main */

int main() {
  for (int i = 0; i < 3; i++) {
    char s[16];
    scanf("%s", s);

    putchar(s[0] - 'a' + 'A');
  }
  putchar('\n');
  
  return 0;
}