//No.197 手品

import java.util.*;
import java.io.*;
import static java.util.Arrays.*;
import static java.lang.Math.*;

public class No0197 {
    
    static final Scanner in = new Scanner(System.in);
    static final PrintWriter out = new PrintWriter(System.out,false);

    static void solve() {
        char[] sb = in.next().toCharArray();
        long n = in.nextLong();
        char[] sa = in.next().toCharArray();
        int cnt = 0;
        for (int i=0; i<3; i++) {
            if (sb[i] != sa[i]) cnt++;
        }
        out.println(cnt>n?"SUCCESS":"FAILURE");
    }

    public static void main(String[] args) {
        long start = System.currentTimeMillis();

        solve();
        out.flush();

        long end = System.currentTimeMillis();
        //trace(end-start + "ms");
        in.close();
        out.close();
    }

    static void trace(Object... o) { System.out.println(deepToString(o));}
}