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: ['7629', '1551', 'd', '4211', '4839', 'b', 'E', 's', '9691', 'D', 'e', 'M', '4495', 'E', 'h', 'S', '9577', 'X', '4481', 'I']

7629, 1551, 4, 4211, 4839, 2, 5, 19, 9691, 4, 5, 13, 4495, 5, 8, 19, 9577, 24, 4481, 9