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: ['637', 'y', 'N', 'k', '7853', '3655', 'z', 'i', 'b', 'w', 'z', '5103', 'D', '7151', 'V', '9175', '9753', 'W']

637, 25, 14, 11, 7853, 3655, 26, 9, 2, 23, 26, 5103, 4, 7151, 22, 9175, 9753, 23