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.

['5273', '5539', '993', '8787', 'r', '1413', '3931', 'z', 'g', 'c', 'D', '9909', 'a', 'V', '1657', '2823', 'e', 't', 't', 'b', '3771', '1177', 'f', '855']
5273, 5539, 993, 8787, 18, 1413, 3931, 26, 7, 3, 4, 9909, 1, 22, 1657, 2823, 5, 20, 20, 2, 3771, 1177, 6, 855

['n', 'h', 'O', 'x', 'O', '2651', '5011', '8271', '9565', '5323', '6315', 'A', '9417', 'C', '6409', 'C', 'T', 'K', 'o', 'O', '2627', 'Y']
14, 8, 15, 24, 15, 2651, 5011, 8271, 9565, 5323, 6315, 1, 9417, 3, 6409, 3, 20, 11, 15, 15, 2627, 25

['F', '5423', '4407', '5723', 'l', '5383']

6, 5423, 4407, 5723, 12, 5383