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

using ll = long long;

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

    string s1, s2, s3;
    cin >> s1 >> s2 >> s3;
    
    assert(1 <= s1.size() && s1.size() <= 10);
    assert(1 <= s2.size() && s2.size() <= 10);
    assert(1 <= s3.size() && s3.size() <= 10);
    for (int i = 0; i < s1.size(); i++)
    {
        assert(islower(s1[i]));
    }
    for (int i = 0; i < s2.size(); i++)
    {
        assert(islower(s2[i]));
    }
    for (int i = 0; i < s3.size(); i++)
    {
        assert(islower(s3[i]));
    }

    cout << (char)toupper(s1[0]);
    cout << (char)toupper(s2[0]);
    cout << (char)toupper(s3[0]);
    cout << endl;
}