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: ['H', 'K', 'V', '8693', '439', '363', '4149', '8143', '2999', '2271', 'z', '3187', 'E', 'N', '2553', 'C', '3979', '5947', '3373', '4333', 'n', '9929', '29', 'T', '3643', '8201', '5751', 'f', '7603', '4729', 'L']

8, 11, 22, 8693, 439, 363, 4149, 8143, 2999, 2271, 26, 3187, 5, 14, 2553, 3, 3979, 5947, 3373, 4333, 14, 9929, 29, 20, 3643, 8201, 5751, 6, 7603, 4729, 12