DeCatCoding

using System;

namespace DeCatCoding
{
	class MainClass
	{
		static string ConvertString(string[] input)
		{
			string output = string.Empty;

			for (int i = 0; i < input.Length; i++)
			{
				uint word = 0;
				foreach (char digit in input[i])
				{
					word = (uint)(word * 21 + (digit - 'a'));
				}
				do
				{
					output = (char)(word % 26 + 'a') + output;
					word /= 26;
				} while (word > 0);
				output = " " + output;
			}
			output = output.Trim();
			return output;
		}

		public static void Main()
		{
			string[] input = Console.ReadLine().Split(' ');

			Console.Write(ConvertString(input));
		}
	}
}