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', 'F', '2541', '4949', 'D', '5551', '9073', '599', '8975', '4263', '5841', 'g', 'T', 'W']

20, 6, 2541, 4949, 4, 5551, 9073, 599, 8975, 4263, 5841, 7, 20, 23