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: ['d', 'f', 'f', '8769', '3101', '7459', 'M', '1047', '7305', 'k', 'q', '7891', '531', '9537', 'Y', 'G', 'm', 'X', '2445', 'p', 'd', '4999', 'u', '3159', 'D', '3001', '2151']

4, 6, 6, 8769, 3101, 7459, 13, 1047, 7305, 11, 17, 7891, 531, 9537, 25, 7, 13, 24, 2445, 16, 4, 4999, 21, 3159, 4, 3001, 2151