using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        string S = Console.ReadLine();
        string T = Console.ReadLine();

        HashSet<string> all = new HashSet<string> { "watermelon", "beachball", "shrinebell" };
        all.Remove(S);
        all.Remove(T);

        foreach (var item in all)
        {
            Console.WriteLine(item);
        }
    }
}