Consecutive Double 'x' Check

Background

Congcong has recently been studying string properties. He found that in some strings, specific characters appear consecutively.

Problem Description

Given a string, return true if the first instance of 'x' in the string is immediately followed by another 'x'.

Input Format

Input is given from Standard Input in the following format.

A single line containing a string $S$.

Output Format

Output is printed to Standard Output in the following format.

Output true if the condition is met, otherwise output false.

Sample

axxbb

true

axaxax

false

xxxxx

true

Sample Explanation

Sample 1: In the string "axxbb\