using System;
using System.Linq;

namespace YukicoderSource
{
    class Program
    {
        static void Main(string[] args)
        {
            var before = Console.ReadLine();
            var n = long.Parse(Console.ReadLine());
            var after = Console.ReadLine();
            var success = "SUCCESS";
            if (before.Count(element => element.Equals('o')) != after.Count(element => element.Equals('o')))
            {
                Console.WriteLine(success);
                return;
            }
            var failure = "FAILURE";
            if (n >= 2)
            {
                Console.WriteLine(failure);
                return;                
            }
            if (n == 1)
            {
                if (before.Equals(after))
                {
                    if (before[0] == before[1])
                    {
                        Console.WriteLine(failure);
                        return;                        
                    }
                    if (before[1] == before[2])
                    {
                        Console.WriteLine(failure);
                        return;
                    }
                    Console.WriteLine(success);
                    return;
                }
                if (before[1] != after[1])
                {
                    Console.WriteLine(failure);
                    return;                    
                }
                Console.WriteLine(success);
                return;                                    
            }
            if (before.Equals(after))
            {
                Console.WriteLine(failure);
                return;                                
            }
            Console.WriteLine(success);
        }
    }
}