import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String Sbefore = sc.next();
        int N = sc.nextInt();
        String Safter = sc.next();
        String ans = judge(Sbefore, Safter, N);
        System.out.println(ans);
        
    }
    static String judge(String x, String y, int N){
        String ans = "SUCCESS";
        int a=0;
        int b=0;
        for(int i=0; i<3; i++){
            if(x.charAt(i)=='o')a++;
        }
        for(int i=0; i<3; i++){
            if(y.charAt(i)=='o')b++;
        }
        if(a==b){
            if(N>=2){
                ans="FAILURE";
            }else if(N==0){
                if(x.equals(y)){
                    ans="FAILURE";
                }
            }else{
                char [] c = x.toCharArray();
                char [] p = new char [3];
                for(int i=0; i<2; i++){
                    if(i==1)continue;
                    p[i]=c[i];
                    p[(i+1)%3]=c[(i+2)%3];
                    p[(i+2)%3]=c[(i+1)%3];
                    String t = String.valueOf(p);
                    if(t.equals(y)){
                        ans="FAILURE";
                        break;
                    }
                }
            }
        }
        return ans;
    }
}