Definition: 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.
Input: ['t', 'u', '7369', 'q', 'y', '9861', 'd', 'e', 'd', 'H', '3209', '4303', 'J', '4871', 'C', 'u', 'O', '4481', 'o', 'w', '5031', 'Q', 'T', '9487', '6487', 'c', '8099', '5835', '2817', 'J']

20, 21, 7369, 17, 25, 9861, 4, 5, 4, 8, 3209, 4303, 10, 4871, 3, 21, 15, 4481, 15, 23, 5031, 17, 20, 9487, 6487, 3, 8099, 5835, 2817, 10