#include <bits/stdc++.h>
using namespace std;

void solve() {
        string a, b, c;
        cin >> a >> b >> c;
        char A = toupper(a[0]), B = toupper(b[0]), C = toupper(c[0]);
        cout << A << B << C << '\n';
}

int main() {
        ios::sync_with_stdio(false);
        cin.tie(NULL);

        int t = 1;
        // cin >> t;
        while (t--) solve();

        return 0;
}