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.
Q: [-49.731, -81, 20.196, -84, 4.046, 12]
A: 
[-81, -84, 12]