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: [643, 236, -534, 56, 812, -933, 6, 873, -491, 831, 112, -487, 18, -176, -385, -507, -502, 702, -920, 511, 112, 760, -440, 479]

[6]