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.

['9419', 't', '9383', 'o', 'Y', 'T', '5949', 's', '1957', 'O', 'w', '3573', 'W', 's', '9431', 'c', '6711']
9419, 20, 9383, 15, 25, 20, 5949, 19, 1957, 15, 23, 3573, 23, 19, 9431, 3, 6711

['t', 'u', 'H', 'y', 'A', 't', 'G', '3361', '8209', 'V', '4765']
20, 21, 8, 25, 1, 20, 7, 3361, 8209, 22, 4765

['o', '8137', 'V', 'q', '2543']

15, 8137, 22, 17, 2543