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: [647, -509, 637, -398, -671, 577, 146, 950, 963, -511, -587, 820, -129, -627, -145, -121, 1000, -948, -495, -914, -315]

[-121]