Background

Description

Given an array of ints, return true if the array contains a 2 next to a 2 or a 4 next to a 4, but not both.

Format

Input

Output

Samples

[1 2 2]

true

[4 4 1]

true

[4 4 1 2 2]

false

Limitation

1s, 1024KiB for each test case.