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: ['m', '7925', '3573', 'J', '9961', '8133', 'g', '9319', 'S', 'o', '7427', '3753', '3047', 'X', '1597', '349', 'E']

13, 7925, 3573, 10, 9961, 8133, 7, 9319, 19, 15, 7427, 3753, 3047, 24, 1597, 349, 5