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: ['s', 'F', '2357', '9453', '7965', 'm', 'S', '8421', 'K', '6793', '789', 'b', '813', '2607', 'S', '6641', '8819', 'P', 'p', 'G', '3363', '1867', 'Y', '6893', '9977', '2211', '235', 'u', 'z', 'x', '3507', 'b', '3383', '1869', 'g', 'q']

19, 6, 2357, 9453, 7965, 13, 19, 8421, 11, 6793, 789, 2, 813, 2607, 19, 6641, 8819, 16, 16, 7, 3363, 1867, 25, 6893, 9977, 2211, 235, 21, 26, 24, 3507, 2, 3383, 1869, 7, 17