In this task you will be given a list of integers. You should only return an integer if the first digit is the same as the last digit in the number. If an integer has a single digit, then it should be returned. If there are no integers that start and end with the same digit then an empty list ("[]") should be returned.
[-481, 764, 645, -633, -658, 777, 662, -881, 642, -991, -559, -672, 510, -267, -422, -999]