import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedHashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Map.Entry;
import java.util.PriorityQueue;
import java.util.Scanner;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
public class Main {
	
	public static void main(String[] args) throws IOException {
		Scanner sc = new Scanner(System.in);
		
		final char[] S_before = sc.next().toCharArray();
		final long N = sc.nextLong();
		final char[] S_after = sc.next().toCharArray();
		
		final int SIZE = 3;
		int before_circles = 0;
		for(char c : S_before){
			if(c == 'o'){ before_circles++; }
		}
		int after_circles = 0;
		for(char c : S_after){
			if(c == 'o'){ after_circles++; }
		}
		
		if(before_circles != after_circles){
			System.out.println("SUCCESS");
		}else if(before_circles == 3 || before_circles == 0){
			System.out.println("FAILURE");
		}else{
			final char purpose = before_circles == 1 ? 'o' : 'x';
			
			int before_pos = -1, after_pos = -1;
			for(int i = 0; i < SIZE; i++){
				if(S_before[i] == purpose){
					before_pos = i;
				}
				if(S_after[i] == purpose){
					after_pos = i;
				}
			}
			
			final long diff = Math.abs(before_pos - after_pos);
			
			//trace(diff);
			
			System.out.println(diff <= N && (after_pos == 0 || after_pos == SIZE - 1 || ((N - diff) % 2 == 0)) ? "FAILURE" : "SUCCESS");
		}
		
	}
 
	public static void trace(Object... args) {
		System.out.println(Arrays.deepToString(args));
	}
 
	public static class Scanner {
		private BufferedReader br;
		private StringTokenizer tok;
 
		public Scanner(InputStream is) throws IOException {
			br = new BufferedReader(new InputStreamReader(is));
		}
 
		private void getLine() throws IOException {
			while (!hasNext()) {
				tok = new StringTokenizer(br.readLine());
			}
		}
 
		private boolean hasNext() {
			return tok != null && tok.hasMoreTokens();
		}
 
		public String next() throws IOException {
			getLine();
			return tok.nextToken();
		}
 
		public int nextInt() throws IOException {
			return Integer.parseInt(next());
		}
		
		public long nextLong() throws IOException {
			return Long.parseLong(next());
		}
 
		public void close() throws IOException {
			br.close();
		}
	}
 
}