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.

[-11.466, -21, 20.328, 20.846, 4.645, -23.691, -1.658, -2.996, -15]
[-21, -15]

[-59.592, 86, 49, -18.768, -97, 39, -9.567, 23.313, 87.736]
[86, 49, -97, 39]

[-31.941, -12, 87, 7.321, 74, -59.967]

[-12, 87, 74]