#include <bits/stdc++.h>
using namespace std;
char zh(int a) {
	return a - 1 + 'A';
}
int main() {
	std::ios::sync_with_stdio(false);
	std::cin.tie(nullptr);
	std::cout.tie(nullptr);
	std::vector<int> v1 = {3, 10, 8}, v2 = {9, 19}, v3 = {19, 2};
	for (int i = 0; i < 3; i++) {
		std::cout << zh(v1[i]);
	}
	std::cout << " ";
	for (int i = 0; i < 2; i++) {
		std::cout << zh(v2[i]);
	}
	std::cout << " ";
	for (int i = 0; i < 2; i++) {
		std::cout << zh(v3[i]);
	}
	return 0;
}