133. Question-able Difficulty
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

You consider a string to be a question if its last character is a question mark. Given a string, figure out whether or not it is a question.

Input

The only line of input contains a single string $$$s$$$.

Output

If the given string is a question (if it has a question mark on the end), output "YES" (no quotes). Otherwise, output "NO" (no quotes).

Examples
Input
Welcome to the CodeRams contest?
Output
YES
Input
We hope you like the problems!
Output
NO
Input
Good luck today
Output
NO