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: [75.507, -12.015, 56, 26.89, -32, -1.632, 70, -13.297, -56.042, -4, -7.878]

[56, -32, 70, -4]