Definition: In this task you will be given a list of numbers. You should remove any number that is not an integer (whole number). If every number is not an whole number then an empty list ("[]") should be returned. Otherwise, answer with the list of whole numbers separated by comma inside brackets.
Input: [-15, 22.291, 22, -35, 21.622, -12.425, 14.548, 20]

[-15, 22, -35, 20]