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.

['R', '5811', '8603', '8417', 'z', 'F', '3247', 'E', '1411', '6897', 'K', 'V', '7271', '1243', '5747', 'y', '5453']
18, 5811, 8603, 8417, 26, 6, 3247, 5, 1411, 6897, 11, 22, 7271, 1243, 5747, 25, 5453

['K', 'f', 'N', 'a', 'H', '5999', 'g', '9589', 'N', 'h', '8451', '7797', 'e', 'P', '785']
11, 6, 14, 1, 8, 5999, 7, 9589, 14, 8, 8451, 7797, 5, 16, 785

['i', 'H', '3667', '4639', '3029', '145', 'X', '3707', 'k']

9, 8, 3667, 4639, 3029, 145, 24, 3707, 11