using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;

public class Program
{
	public static void Main()
	{
		foreach (var test in GetTestCases()) {
			var result = IsAnagramPair(test.First, test.Second);
			Console.WriteLine((result == test.Expected) ? "Success" : "FAIL");
		}
	}

	// Assumptions:
	// Word or phrase only uses English alphabet.
	// Test cases don't pass in null for first and second.
	public static bool IsAnagramPair(string first, string second)
	{
		var firstPhrase = RemoveNonAlphabeticCharacter(first);
		var secondPhrase = RemoveNonAlphabeticCharacter(second);

		if(string.IsNullOrEmpty(firstPhrase) || string.IsNullOrEmpty(secondPhrase) || firstPhrase.Length != secondPhrase.Length){
			return false;
		}

		var firstPhraseSorted = SortLetter(firstPhrase.ToLower());
		var secondPhraseSorted = SortLetter(secondPhrase.ToLower());

		return firstPhraseSorted == secondPhraseSorted;
	}

	public static string RemoveNonAlphabeticCharacter(string phrase) {
		return Regex.Replace(phrase, @"[^a-z]", "", RegexOptions.IgnoreCase);
	}

	public static string SortLetter(string phrase){
		var letters = phrase.ToCharArray();
		Array.Sort(letters);
		return new String(letters);
	}

	public static IEnumerable<TestCase> GetTestCases()
	{
		yield return new TestCase { First = "add", Second = "dad", Expected = true };
		yield return new TestCase { First = "aad", Second = "dad", Expected = false };
		yield return new TestCase { First = "Astronomer", Second = "Moon starer", Expected = true };
		yield return new TestCase { First = "thorough", Second = "through", Expected = false };
		yield return new TestCase { First = "Jim Morrison", Second = "Mr. Mojo Risin'", Expected = true };
		yield return new TestCase { First = "", Second = "", Expected = false };
		yield return new TestCase { First = "	", Second = "	", Expected = false };
		yield return new TestCase { First = "	1", Second = "1	", Expected = false };
		yield return new TestCase { First = "\n he\tl o   l", Second = " hello\\n", Expected = false };
		yield return new TestCase { First = "\n he\tl o   l", Second = " hello\n", Expected = true };
	}
}

public class TestCase
{
	public string First { get; set; }
	public string Second { get; set; }
	public bool Expected { get; set; }
}