#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i< (n); ++i)
#define repi(i, a, b) for (int i = (a); i < (b); ++i)
#define all(x) (x).begin(), (x).end()
#define fore(i, a) for(auto &i:a)
using ll = long long;

int main() {
	string s1,s2,s3;
	cin >> s1 >> s2 >> s3;
	char c1,c2,c3;
	c1 = (s1[0]-'a')+'A';
	c2 = (s2[0]-'a')+'A';
	c3 = (s3[0]-'a')+'A';
  cout << c1 << c2 << c3 << endl;
}