[2490] 웇놀이

#include<iostream>
using namespace std;
int main()
{
	for (int i = 0; i < 3; i++)
	{
		int a, b, c, d, sum = 0;
		cin >> a >> b >> c >> d;
		sum = a + b + c + d;
		switch (sum)
		{
		case 0:
			cout << "D\n";
			break;
		case 1:
			cout << "C\n";
			break;
		case 2:
			cout << "B\n";
			break;
		case 3:
			cout << "A\n";
			break;
		case 4:
			cout << "E\n";
			break;
		default:
			break;
		}
	}
	return 0;
}