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', '9861', 'y', '6817', 'Q', 'C', '3147', 'q', 'a', '5605', 'd', '5845', '227', '1015', '9173', '4879', '2375', '2461', 'b', 'p', 'd', '3049', '575', '4935']

20, 9861, 25, 6817, 17, 3, 3147, 17, 1, 5605, 4, 5845, 227, 1015, 9173, 4879, 2375, 2461, 2, 16, 4, 3049, 575, 4935