//#define _GLIBCXX_DEBUG
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (ll)(n); i++)
#define all(a) (a).begin(), (a).end()
using ll = long long;
const int INF32 = 2e9;
const ll INF64 = 4e18;

int main() {
    string s1, s2, s3;
    cin >> s1 >> s2 >> s3;
    int sa = 'A'-'a';
    cout << (char)(s1[0]+sa) << (char)(s2[0]+sa) << (char)(s3[0]+sa) << endl;
    return 0;
}