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.

['A', '785', '1403', '5507', '5833']
1, 785, 1403, 5507, 5833

['9973', '4501', '3257', '7393', '2041', '1173', 'f', '3299', '1399', 'S', 'a', '7829', '2557', '6051', '7063', '2537', 'k', 'b', 'W', '9133', 'd']
9973, 4501, 3257, 7393, 2041, 1173, 6, 3299, 1399, 19, 1, 7829, 2557, 6051, 7063, 2537, 11, 2, 23, 9133, 4

['2897', 'G', 'p', '8757', '9335', '103', 'U', 'B', '2921', '8725', 'I', '9165', 't', '309', '4475', '815', 'K', '3777', 'I', 'x', 'Z']

2897, 7, 16, 8757, 9335, 103, 21, 2, 2921, 8725, 9, 9165, 20, 309, 4475, 815, 11, 3777, 9, 24, 26