Lucky Palindromic Number Checker

You are given two inputs, an integer n which represents the length of a number, and an integer number. Your task is to determine whether number is a lucky palindromic number.

A lucky palindromic number satisfies the following conditions:

• The number is palindromic, i.e. it reads the same backwards as forwards.
• Every digit in the number is either 3 or 8.

Output YES if the number meets both conditions and NO otherwise.

Note: Although n denotes the intended length of the number, you only need to check the palindromicity and allowed digit criteria.

inputFormat

The input consists of a single line containing two space-separated values:

• An integer n representing the length of the number.
• An integer number which is the number to be checked.

All input should be read from stdin.

outputFormat

Output a single line with YES if the given number is a lucky palindromic number; otherwise, output NO. The output should be written to stdout.

## sample

3 838

YES