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: ['6985', 'd', 'V', 'v', '9903', 'a', 'F', 'j', '6423', 'J', '6795', '7499', '235', '3377', 'N', 'z', '3137', '4149', 'R', 'b', '7145', 'V', 'v', '1361', 'u', '8501', '6703', 'i', '8043', '3427', '9375', '7771', '9901', '7331', '2557', '5623', '1797', 'C', 'C']

6985, 4, 22, 22, 9903, 1, 6, 10, 6423, 10, 6795, 7499, 235, 3377, 14, 26, 3137, 4149, 18, 2, 7145, 22, 22, 1361, 21, 8501, 6703, 9, 8043, 3427, 9375, 7771, 9901, 7331, 2557, 5623, 1797, 3, 3