Write a program that reads a list of integers and two numbers: p and m. The program is to check that p and m never occur next to each other (in any order) in the list.
Input data format
The first line contains the size of a list, N.
The next N lines contain the elements of the list.
The last line contains two integer numbers p and m separated by space.
Output data format
Print "NO" if the numbers are next to each other or "YES" if p and m are never near each other
