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: ['S', 'C', 'P', '747', '4127', '2881', 'D', 'H', 'b', 'z', 'h', 'v', '191', '5303', 'm', '111', '5967', '5411', '5047', '2733', 'K', '2447', 's', '8623', '1197', '27', '527', 'o', '5181', 'R', '4135']

19, 3, 16, 747, 4127, 2881, 4, 8, 2, 26, 8, 22, 191, 5303, 13, 111, 5967, 5411, 5047, 2733, 11, 2447, 19, 8623, 1197, 27, 527, 15, 5181, 18, 4135