#include<iostream>
using namespace std;
main(){
 int x, y;
 while( cin >> x >> y && x && y ){
int m = x+y;
char ch = 'A';
for ( int i = 1; i < 5; i++ ){
 cin >> x >> y;
 if ( x+y > m ){
m = x+y;
ch = (char)('A' + i);
 }
}
cout << ch << " " << m << endl;
 }
}
