#include <iostream>

using namespace std;
 
int main()
{
    int s1[5],s2[5];
 
    while (true) {
	cin >> s1[0] >> s2[0];
	if (!s1[0] && !s2[0]) break;
 
	int max = s1[0] + s2[0], num = 1;
	for (int i = 1; i < 5; i++) {
	    cin >> s1[i] >> s2[i];
	    if (max < s1[i]+s2[i]) {
		max = s1[i] + s2[i];
		num = i + 1;
	    }
	}
	
	switch(num){
            case 1:
                cout << 'A';
                break;
            case 2:
                cout << 'B';
                break;
            case 3:
                cout << 'C';
                break;
            case 4:
                cout << 'D';
                break;
            case 5: 
                cout << 'E';
                break;
	}
	cout << ' ' << max << endl;
    }
    return 0;
}