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: ['f', '3083', 'T', '1727', 'i', '3765', '7449', 'J', 'P', '6085', '5867', '2849', 'Z', 'F', 'R', '8871', 'd']

6, 3083, 20, 1727, 9, 3765, 7449, 10, 16, 6085, 5867, 2849, 26, 6, 18, 8871, 4