import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.HashSet;
import java.util.NoSuchElementException;
import java.util.Set;

public class Main {
	public static void main(String args[]) {
		FastScanner scanner = new FastScanner();
		String sb=scanner.next();
		int n = scanner.nextInt();
		String sa=scanner.next();
		Set<String>bs=new HashSet<>();
		Set<String>as=new HashSet<>();
		int cnto=0;
		int cntx=0;
		int io=0;
		int ix=0;
		for(int i=0;i<3;i++) {
			String cb=sb.substring(i, i+1);
			String ca=sa.substring(i, i+1);
			if(cb.equals("o")) {
				cnto++;
				io=i;
			}
			else {
				cntx++;
				ix=i;
			}
			bs.add(cb);
			as.add(ca);
		}
		int indb=cnto<cntx?io:ix;
		cnto=0;
		cntx=0;
		io=0;
		ix=0;
		for(int i=0;i<3;i++) {
			String ca=sa.substring(i, i+1);
			if(ca.equals("o")) {
				cnto++;
				io=i;
			}
			else {
				cntx++;
				ix=i;
			}
		}
		int inda=cnto<cntx?io:ix;
		if(bs.size()==1||as.size()==1) {
			if(bs.size()==1&&as.size()==1) {
				if(sb.charAt(0)==sa.charAt(0)) {
					System.out.println("FAILURE");
				}else {
					System.out.println("SUCCESS");
				}
			}else {
				System.out.println("SUCCESS");
			}
		}else {
			String tb[]=sb.split("");
			String ta[]=sa.split("");
			Arrays.sort(tb);
			Arrays.sort(ta);
			boolean b=false;
			for(int i=0;i<3;i++) {
				if(tb[i].equals(ta[i]))continue;
				else b=true;
			}
			if(b) {
				System.out.println("SUCCESS");
			}else {
				if(Math.abs(inda-indb)%2==n%2) {
					System.out.println("FAILURE");
				}else {
					System.out.println("SUCCESS");
				}
			}
		}
	}
}

class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}