using System;

class Magic
{
	static void Main(String[] args)
	{
		String Sbefore;
		long N;
		String Safter;

		Sbefore = Console.ReadLine();
		N = long.Parse(Console.ReadLine());
		Safter = Console.ReadLine();

		int cb = CountCoins(Sbefore);
		int ca = CountCoins(Safter);

		if(cb != ca)
		{
			Console.WriteLine("SUCCESS");
			return;
		}
		if(cb == 0 || cb == 3)
		{
			Console.WriteLine("FAILURE");
			return;
		}
		if(N >= 2)
		{
			Console.WriteLine("FAILURE");
			return;
		}
		if(N == 1)
		{
			if(SwapCmp(Sbefore, Safter))
			{
				Console.WriteLine("FAILURE");
				return;
			}
			else
			{
				Console.WriteLine("SUCCESS");
				return;
			}
		}
		if(N == 0)
		{
			if(Sbefore == Safter)
			{
				Console.WriteLine("FAILURE");
				return;
			}
			else
			{
				Console.WriteLine("SUCCESS");
				return;
			}
		}

	}

	static int CountCoins(String S)
	{
		int ret = 0;

		foreach(char c in S)
		{
			if(c == 'o')
				ret++;
		}
		return ret;
	}

	static bool SwapCmp(String b, String a)
	{
		char[] buff = new char[3];
		
		buff[0] = b[1];
		buff[1] = b[0];
		buff[2] = b[2];

		String s1 = new String(buff);
		if(s1 == a)
			return true;

		buff[0] = b[0];
		buff[1] = b[2];
		buff[2] = b[1];

		String s2 = new String(buff);
		if(s2 == a)
			return true;
		return false;
	}
}