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: ['k', '7503', '9047', 'J', 'S', 'd', 'Z', 'K', '1311', '6505', '6779', '8359', '5989', '9907']

11, 7503, 9047, 10, 19, 4, 26, 11, 1311, 6505, 6779, 8359, 5989, 9907