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.

['a', '8619', 'v', '8727', '779', 'S', 'u', 'P', '2811', 'h', '2029', 'M', 'Y', '4547', 'B', 'J', '3157', '2629', '465']
1, 8619, 22, 8727, 779, 19, 21, 16, 2811, 8, 2029, 13, 25, 4547, 2, 10, 3157, 2629, 465

['f', 'r', '6671', '6965', 'O', '4937', 'o', 'w', '2891', '6529']
6, 18, 6671, 6965, 15, 4937, 15, 23, 2891, 6529

['5875', 'C', '521', '4871', '7673', '8837', 'i', 'w', 'K', '6697']

5875, 3, 521, 4871, 7673, 8837, 9, 23, 11, 6697