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: ['E', 'O', '6849', '8985', '51', '3567', '713', '4907', 't', '2663', '5085', '6833', 'M', '6201', 'w', '383', 'W', 'u', '1297', 'M', 'W', 'A', '3189', 'v', 'd']

5, 15, 6849, 8985, 51, 3567, 713, 4907, 20, 2663, 5085, 6833, 13, 6201, 23, 383, 23, 21, 1297, 13, 23, 1, 3189, 22, 4