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: ['O', '7637', '5613', '3327', '7695', 'Y', 'i', 'c', 'S', 't', '7119', 'u', 'z', '7427', '8249', '5369', '5719', 'C', '8467', '4711', '343', '3133', '5345', 'Q', '1103', 'J', '1693', 'S', 'w', '9993', 'E']

15, 7637, 5613, 3327, 7695, 25, 9, 3, 19, 20, 7119, 21, 26, 7427, 8249, 5369, 5719, 3, 8467, 4711, 343, 3133, 5345, 17, 1103, 10, 1693, 19, 23, 9993, 5