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: [55, 49.171, -33.388, -75.365, 11.246, 4, 32.471, -19.512, 81]

[55, 4, 81]