using System;
using System.Linq;
using System.Collections.Generic;

class Program {
    static void Main(string[] args) {
        var di = new Dictionary<char, int>();
        for (int i = 0; i < 3; i++) {
            var d = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();
            di.Add((char)('A' + i), d[0] * 100 - d[1]);
        }
        var s = di.OrderByDescending(x => x.Value);
        foreach (var i in s) {
            Console.WriteLine(i.Key);
        }
    }
}