Odd Increment, Even Decrement

Write a function odd_increment_even_decrement_no_modify(items) that takes a list of integers and returns a new list in which every odd number has been increased by 1 and every even number has been decreased by 1. The original list must not be changed.

Example

odd_increment_even_decrement_no_modify([1, 2, 3, 4])  ->  [2, 1, 4, 3]

Your task

Implement this function:

def odd_increment_even_decrement_no_modify(items: list) -> list:

Write the function only — the arguments are read for you and the return value is printed automatically.

Arguments arrive as one Python literal per line, in this order: items.

Example

Input

[1, 2, 3, 4]

Output

[2, 1, 4, 3]