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.
[-326, 404, 521, 263, -743, -935, 401, 161, -435, -964, 847, 688, -961, 528, 637, -435, 227, -623]