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 && (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(); } } }