Definition: 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.
Input: [466, -431, -451, 896, 724, -377, -871, 86, -840, -121, 830, 782, -67, -857, 45, 668, -656, -217]

[-121, -656]