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.

[EX Q]: ['1107', 'C', '5921', '7815', '1509', 'l']
[EX A]: 1107, 3, 5921, 7815, 1509, 12

[EX Q]: ['a', '9907', '6485', 'K', 'e', 'X', '687', '7687', '589', 'n', '7287', '9637']
[EX A]: 1, 9907, 6485, 11, 5, 24, 687, 7687, 589, 14, 7287, 9637

[EX Q]: ['4569', '8461', '515', 'n', '3525', '2165', '4283', '679', 'Y']
[EX A]:
4569, 8461, 515, 14, 3525, 2165, 4283, 679, 25