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', 'a', '4979', '499', 'E', 'u', 'b', '9595', 'I', '6265']

13, 1, 4979, 499, 5, 21, 2, 9595, 9, 6265