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: ['7961', '3425', 'C', 'H', 'D', 'O', '651', '2779', 'X', '5005', '8797', 'I', '9727', '1499', 'y', 'I', '8657', '805', 'c']

7961, 3425, 3, 8, 4, 15, 651, 2779, 24, 5005, 8797, 9, 9727, 1499, 25, 9, 8657, 805, 3