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: [634, 245, 90, -712, -718, 646, -320, 361, -844, 736, -559, -512, 397, 750, -597, -920, 208, -803, 339, -973, -687, -121, -278]

[646, -121]