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: [-12.78, -65.884, -91, 75, 74, -52, 0.0, -72, 78, 75.827, 20.88]

[-91, 75, 74, -52, -72, 78]