import java.util.Scanner;
public class Tejina {

	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		StringBuilder be = new StringBuilder(s.next());
		int N = s.nextInt();
		String af = s.next();
		s.close();
		for(int i = 0;i < 2;i++){
			if(be.charAt(i) != af.charAt(i)){
				if(be.charAt(i) == af.charAt(i+1)){
					N--;
					char c = be.charAt(i);
					be.deleteCharAt(i);
					be.insert(i+1, c);
				}else if(be.charAt(i) == af.charAt(2));{
					N -= 2;
					char c = be.charAt(i);
					be.deleteCharAt(i);
					be.append(c);
				}
			}
		}
		if(N < 0 || N%2 == 1){
			System.out.println("SUCCESS");
		}else{
			System.out.println("FAILURE");
		}

	}

}