Description

Enter a string and determine whether it is a palindrome. A palindrome is a string that reads the same forwards and backwards.

Input Format

The input is a single line of string (the string contains no whitespace characters, and its length does not exceed 100).

Output Format

If the string is a palindrome, output yes; otherwise, output no.

abcdedcba

yes

abcdcbd

no

## Source

CodesOnline