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', 'r', '665', 'E', 's', 'D', '6363', 'p', 'E', 'M', '6097', '8989']

13, 18, 665, 5, 19, 4, 6363, 16, 5, 13, 6097, 8989