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: ['O', 'C', '3371', '5213', '9259', '2607', '2413', '9363', 'G', '4583', 'w', '2259', '293', 'E', '3281', '9455', 'W', '193', '7007', 's', '2481', '431', '6919', 'N', '3243', '1513', '6377', 'K', '2511', 'T', '2213']

15, 3, 3371, 5213, 9259, 2607, 2413, 9363, 7, 4583, 23, 2259, 293, 5, 3281, 9455, 23, 193, 7007, 19, 2481, 431, 6919, 14, 3243, 1513, 6377, 11, 2511, 20, 2213