#include <iostream>

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

	char s[3][11];
	std::cin >> s[0] >> s[1] >> s[2];

	std::cout << static_cast<char>(toupper(s[0][0])) << static_cast<char>(toupper(s[1][0])) << static_cast<char>(toupper(s[2][0])) << '\n';
	return 0;
}