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: [-60.621, 3.689, 56, -58, 5.418, 44, 45, -20, 10.726]

[56, -58, 44, 45, -20]