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

using ll = long long;
#define rep(i, a, n) for(int i = a; i < n; i++)

int main() {
	string a, b, c, ans;
	cin >> a >> b >> c;
	ans += toupper(a[0]);
	ans += toupper(b[0]);
	ans += toupper(c[0]);
	cout << ans << endl;
}