#include <iostream>
#include <string>
#include <cctype>

int main() {
    // 高速な入出力
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(NULL);

    std::string s1, s2, s3;
    std::cin >> s1 >> s2 >> s3;
    
    std::cout << (char)std::toupper(s1[0]) 
              << (char)std::toupper(s2[0]) 
              << (char)std::toupper(s3[0]) 
              << std::endl;
    
    return 0;
}