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: ['m', '7307', '4585', '7599', 'F', 'k', '8959', 'g', '5243', 'S', 'T', '765', '8317', '921', 'n', '8163', '4029', '8935', '8029', '8151', 'k', '7961', '997', '7317', '8639', 'B', '8609', '4687', '9961']

13, 7307, 4585, 7599, 6, 11, 8959, 7, 5243, 19, 20, 765, 8317, 921, 14, 8163, 4029, 8935, 8029, 8151, 11, 7961, 997, 7317, 8639, 2, 8609, 4687, 9961