Competitions
Week 2 Conditionals Part 2
Five-digit in order
Five-digit number is given. Determine whether all its digits are in ascending order, starting with the leftmost one. For example, in the number 15689 all digits are arranged in ascending order.
Input data
One five-digit number n.
Output data
Print ""YES", if all digits in number n are arranged in ascending order, and ""NO" otherwise.
Examples
Input example #1
15689
Output example #1
YES
Input example #2
12321
Output example #2
NO