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.
[-575, 521, -51, -10, -43, -333, -873, -223, 169, 158, -277, -675, 598, 513, 784, 847, 603, 835, -9, 175, 972, 504]