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

using namespace std;

int main() {
    string s1, s2, s3;
    cin >> s1 >> s2 >> s3;

    cout << (char)toupper(s1[0]) << (char)toupper(s2[0]) << (char)toupper(s3[0]) << endl;

    return 0;
}