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: ['7151', '3657', 'C', '5875', '497', 'Q', '9035', 'G', 'H', '9507', '5893', '9963', 'Z', 'c', 'C', 's', '1307', 'w', '3779', 'C', 'X']

7151, 3657, 3, 5875, 497, 17, 9035, 7, 8, 9507, 5893, 9963, 26, 3, 3, 19, 1307, 23, 3779, 3, 24