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: [-81, 66.466, 2.685, -76.137, 3.668, -3.178, 47, -1.221, 7.451]

[-81, 47]