#include <bits/stdc++.h>
//#include <atcoder/modint>

using namespace std;
//using namespace atcoder;
using ll = long long;
//using mint = modint998244353;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    string s;
    for (int i=0; i<3; i++){
        cin >> s;
        cout << char(s[0]+'A'-'a');
    }
    cout << endl;

    return 0;
}