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: ['L', '7057', '2321', '4003', 'G', 'b', '2859', '1219', '7833', 'Z', '5081', 'h', 'X', '6133', 'I', '7953', '1753', 'P', '8683', '8373', 'b', '6915', 's', '545', 'P', 'j', 'Y', 'B', '5427', '919', '7363', 'C', 'n']

12, 7057, 2321, 4003, 7, 2, 2859, 1219, 7833, 26, 5081, 8, 24, 6133, 9, 7953, 1753, 16, 8683, 8373, 2, 6915, 19, 545, 16, 10, 25, 2, 5427, 919, 7363, 3, 14