Background

Description

Given a string, if one or both of the first 2 chars is 'x', return the string without those 'x' chars, and otherwise return the string unchanged. This is a little harder than it looks.

Format

Input

Output

Samples

xHi

"Hi"

Hxi

"Hi"

Hi

"Hi"

Limitation

1s, 1024KiB for each test case.