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

class Program
{
    public void Solve()
    {
        List<KeyValuePair<string, int[]>> HW = new List<KeyValuePair<string, int[]>>();
        HW.Add(new KeyValuePair<string, int[]>("A", Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray()));
        HW.Add(new KeyValuePair<string, int[]>("B", Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray()));
        HW.Add(new KeyValuePair<string, int[]>("C", Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray()));

        foreach (var item in HW.OrderByDescending(x => x.Value[0]).ThenBy(x => x.Value[1]))
        {
            Console.WriteLine(item.Key);
        }
    }

    static void Main()
    {
        var solver = new Program();
        solver.Solve();
    }
}