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.
[991, 691, -694, 681, -365, 69, -983, 235, -463, 346, 899, -615, -550, -458, 647]