#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using ll = long long;

int main(){
  vector<string> s(3);
  cin >> s[0] >> s[1] >> s[2];
  for(int i=0; i<3; i++){
    cout << (char)toupper(s[i][0]);
  }
  return 0;
}