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: ['7001', '7311', 'i', '6055', 'o', 'z', '4643', '3923', '2459', '4557', '9599', 'Q', 'c', '7895', 'm', '8549', '3631', '5549', 'd', 'U', 'G', '3079', '3717', 'x', '557', '8397', '2921', 'J', 'x', 'W', '3613', 'a', 'T', '8917']

7001, 7311, 9, 6055, 15, 26, 4643, 3923, 2459, 4557, 9599, 17, 3, 7895, 13, 8549, 3631, 5549, 4, 21, 7, 3079, 3717, 24, 557, 8397, 2921, 10, 24, 23, 3613, 1, 20, 8917