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: ['6253', '2253', 'k', '4175', 'i', '3443', '6395', 'D', '7465', 'm', 'i', 'q', 'T', 'm', 'e', 'w']

6253, 2253, 11, 4175, 9, 3443, 6395, 4, 7465, 13, 9, 17, 20, 13, 5, 23