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', '789', '9207', 'I', 'N', '2119', '9037', 'e', '1249', 'O', 'H']

13, 789, 9207, 9, 14, 2119, 9037, 5, 1249, 15, 8