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: [26, -32, 14, 61.421, 42.628, 25.432, 54.839, -13, 17.578]

[26, -32, 14, -13]