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: [-38.963, 18, -58.545, 26.592, 72, 4.545, -7.044, 4, 55.009]

[18, 72, 4]