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.

['8851', 'k', 'x', 'O', '9071', 'C', 'O', 'k', 'd', '5141', 'e', 'l', '4239', 'S', '2521', 'G', 'y', 'v', 't', '5275', '8869', '7553', '1857', '7843', '2203', 'v', '7867', 'D', '299', '2347', 'Z', 'K']
8851, 11, 24, 15, 9071, 3, 15, 11, 4, 5141, 5, 12, 4239, 19, 2521, 7, 25, 22, 20, 5275, 8869, 7553, 1857, 7843, 2203, 22, 7867, 4, 299, 2347, 26, 11

['5545', '7973', 'M', 'y', '8231', 'D', '7831', '91', '5517', 'd', 'E', 'Y', 'S', 'c', '8775', '4131', '1279', 'b', 'M']
5545, 7973, 13, 25, 8231, 4, 7831, 91, 5517, 4, 5, 25, 19, 3, 8775, 4131, 1279, 2, 13

['B', 'N', '7321', '7109', 'Q', 'Q', '9463']

2, 14, 7321, 7109, 17, 17, 9463