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

['6881', 'F', '4759', '5797', '4879', '5761', '9913', '8509', 'c', 'X', 'U']
6881, 6, 4759, 5797, 4879, 5761, 9913, 8509, 3, 24, 21

['A', '1557', 'S', '2777', '8387', '9173', '8543', 'M', '5663', '4153', '1115', 'X', '1175', '8329', '2333', '1225', '4485']

1, 1557, 19, 2777, 8387, 9173, 8543, 13, 5663, 4153, 1115, 24, 1175, 8329, 2333, 1225, 4485