Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['2017', 'L', '6757', '4469', 'P', 'f', 'c', '5397', '975', '2647', 'h', 'V', '3581', '1169', 'i', '7171', '2099', '4487', 'Q', '1087', '6827', 'D', '3377', '6579', 'v', '733', 'k', '8377', '6863', '883', '9779', '1539', 'V']

2017, 12, 6757, 4469, 16, 6, 3, 5397, 975, 2647, 8, 22, 3581, 1169, 9, 7171, 2099, 4487, 17, 1087, 6827, 4, 3377, 6579, 22, 733, 11, 8377, 6863, 883, 9779, 1539, 22