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

namespace y
{
    class Program
    {
        static void Main(string[] args)
        {
            var a = new List<p>();
            for (int i = 0; i < 3; i++)
            {
                string[] ss = Console.ReadLine().Split();
                a.Add(new p(Convert.ToChar(('A' + i)).ToString(), int.Parse(ss[0]), int.Parse(ss[1])));
            }

            var f = a.OrderByDescending(x => x.h).ThenBy(x => x.w);

            foreach (var v in f)
            {
                Console.WriteLine(v.n);
            }
        }
    }

    class p
    {
        public p(string h1, int h2, int h3)
        {
            n = h1;
            h = h2;
            w = h3;
        }
        public string n;
        public int h;
        public int w;
    }
}