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

using ll = long long;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep1(i, n) for (int i = 1; i <= (int)(n); i++)
#define all(v) v.begin(), v.end()
const int INF = 1001001001;

const int dx[] = {0, 1, 0, -1, 1, 1, -1, -1};
const int dy[] = {1, 0, -1, 0, 1, -1, 1, -1};

bool rev(string str) {
    string re = str;
    reverse(all(re));
    if (re == str) {
        return true;
    } else {
        return false;
    }
}

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

    string s1, s2, s3;
    cin >> s1 >> s2 >> s3;
    cout << (char)(s1[0] - 'a' + 'A') << (char)(s2[0] - 'a' + 'A') << (char)(s3[0] - 'a' + 'A') << endl;

    return 0;
}