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: ['X', '7925', 'o', 'p', '4039', '4813', '2509', '3465', '9565', '7835', '9245', 'y', '395', '4299', '1929', 'p']

24, 7925, 15, 16, 4039, 4813, 2509, 3465, 9565, 7835, 9245, 25, 395, 4299, 1929, 16