#include <fstream>
#include <iostream>

int main() {

	//std::ifstream inf("Text.txt");	std::cin.rdbuf(inf.rdbuf());

	int A, B, C;
	std::cin >> A >> B >> C;

	if (A > B) {
		if (A > C) {
			if (B > C) {
				std::cout << "A\nB\nC" << std::endl;
			}
			else {
				std::cout << "A\nC\nB" << std::endl;
			}
		}
		else {
			std::cout << "C\nA\nB" << std::endl;
		}
	}
	else {
		if (B > C) {
			if (A > C) {
				std::cout << "B\nA\nC" << std::endl;
			}
			else {
				std::cout << "B\nC\nA" << std::endl;
			}
		}
		else {
			std::cout << "C\nB\nA" << std::endl;
		}
	}

	return 0;
}