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

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