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: ['F', '9765', 'N', '2887', 'G', 'S', 'K', 'A', 'o', 'H', 'e', 'E', '573', '6727', 'u', '8415', 'h', '5191', 'E', '9253', 'J', 'z', '6025', '5733', 'J', 'x', 'N', '4475', '6373', 'W', '9255', '8209', '9425', 'j', '5851', '1497', '3519', '3507', '4111', '531']

6, 9765, 14, 2887, 7, 19, 11, 1, 15, 8, 5, 5, 573, 6727, 21, 8415, 8, 5191, 5, 9253, 10, 26, 6025, 5733, 10, 24, 14, 4475, 6373, 23, 9255, 8209, 9425, 10, 5851, 1497, 3519, 3507, 4111, 531