rfgergergearg

import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        int counter = 0;

        int size = scanner.nextInt();

        int [] myArray = new int[size];

        for(int i=0; i<size; i++ ) {
         myArray[i] = scanner.nextInt();
        }

        int n = scanner.nextInt();
        int m = scanner.nextInt();

        for(int j=0; j<size; j++) {
         if(myArray[j] == n && myArray[j-1] == m)
         {
             System.out.println("false");
             break;
         }
         else if(myArray[j] == m && myArray[j] == n)
         {
             System.out.println("false");
             break;
         }
         else if(myArray[j] != n || myArray[j] != m)
         {
             counter++;
             if(counter == size)
             {
                 System.out.println("true");
             }
         }

        }
    }
}