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', 'S', 'M', '5665', 'G', 'q', '9617', '2241', 'o', 'M', '1287']

5, 19, 13, 5665, 7, 17, 9617, 2241, 15, 13, 1287