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: ['J', 'o', 'l', '2535', 'r', 'D', '3411', 'v', '1069', 'D', '8201', '5837']

10, 15, 12, 2535, 18, 4, 3411, 22, 1069, 4, 8201, 5837