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: ['9277', 'o', 'N', '99', '2835', 't', 'm', 'E', 'q', '3529', 'd', 's', '5017', '6663', '6121', 'l', '6493', 'V', 'k', '8097', '8749', '7153', '5991', 'Z', 'n', 'H', 'C']

9277, 15, 14, 99, 2835, 20, 13, 5, 17, 3529, 4, 19, 5017, 6663, 6121, 12, 6493, 22, 11, 8097, 8749, 7153, 5991, 26, 14, 8, 3