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.

['5473', '3897', 'E', '7551', 'U', 'l', 'C', 'p', 'w', 'g']
5473, 3897, 5, 7551, 21, 12, 3, 16, 23, 7

['n', 'O', '8931', 'O', '887', 'n', '4103', '5991', '9925', '6213', '9739', '5767', 'r', 'x', 'v', 'M', 'S', '3303', '4583', '3347', '9277', '899', '9321']
14, 15, 8931, 15, 887, 14, 4103, 5991, 9925, 6213, 9739, 5767, 18, 24, 22, 13, 19, 3303, 4583, 3347, 9277, 899, 9321

['D', 'b', '8477', 'z', 'U', '925', 'O', '2345', '4413', 's', 'M', 'p']

4, 2, 8477, 26, 21, 925, 15, 2345, 4413, 19, 13, 16