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: ['T', 'w', '3639', 'S', '8611', 'F', '4975', 's', '2723', 'd', 'p', 'N', '7099', 'r', 'X', '7785', 'O', '5593', '3007', 'x', 'H', '3575', 'q', '4889', 't', '5601', '2543', '2639', '7341', '6977', '9745', 'P', '7121', '7297', 'H', 'X']

20, 23, 3639, 19, 8611, 6, 4975, 19, 2723, 4, 16, 14, 7099, 18, 24, 7785, 15, 5593, 3007, 24, 8, 3575, 17, 4889, 20, 5601, 2543, 2639, 7341, 6977, 9745, 16, 7121, 7297, 8, 24