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: ['C', '4561', 'L', 'Q', 'm', 'f', '4277', '8875', 'd', 'F', '7955', 'k', 'j', '1719', '4229', 'N', '2065']

3, 4561, 12, 17, 13, 6, 4277, 8875, 4, 6, 7955, 11, 10, 1719, 4229, 14, 2065