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: ['R', 'h', '7903', 'K', 'T', 'y', '4023', '3047', '5493', '335', '3063', 'P', '8281', '7677', '5925', '4915', '4101', 'Q', '3219', 'q', 'L', '3677', 'X', '6763', '3143', '8843', 'n', 'U', '4879', '8867']

18, 8, 7903, 11, 20, 25, 4023, 3047, 5493, 335, 3063, 16, 8281, 7677, 5925, 4915, 4101, 17, 3219, 17, 12, 3677, 24, 6763, 3143, 8843, 14, 21, 4879, 8867