Background

Description

Given a string, return a version without the first 2 chars. Except keep the first char if it is 'a' and keep the second char if it is 'b'. The string may be any length. Harder than it looks.

Format

Input

Output

Samples

Hello

"llo"

java

"va"

away

"aay"

Limitation

1s, 1024KiB for each test case.