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: [-71, -93, -6.597, -9, -1.211, 12.253, 40, 12.779, -12.392, 91, -56]

[-71, -93, -9, 40, 91, -56]