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.
[581, 911, 677, 635, -224, -692, -35, -661, 726, 951, -423, -909, -423, 127, 393, -162, 331, 18]