[BOJ] 윷놀이

#include <iostream>
using namespace std;

int main()
{
	int yoot[4];
	int count=0;
	for (size_t i = 0; i < 3; i++)
	{
		cin >> yoot[0] >> yoot[1] >> yoot[2] >> yoot[3];
		for (auto& i : yoot)
		{
			count += i;
		}
		count = (count == 4) ? 4 : 3 - count;
		cout << char('A' + count) << endl;
		count = 0;
	}
}