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: ['2405', '6771', '5097', 'w', '6341', '4817', '3227', 'b', 'T', '3617', 'r', 'o', 'b', '6381', 'F', 'H']

2405, 6771, 5097, 23, 6341, 4817, 3227, 2, 20, 3617, 18, 15, 2, 6381, 6, 8