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

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(0);
    string A, B, C;
    cin >> A >> B >> C;
    cout << (char)toupper(A[0]) << (char)toupper(B[0]) << (char)toupper(C[0]) << endl;
}