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: ['q', '2157', '1747', '555', 'Z', 'Z', 't', 'h', '9695', '4939', 'k', 'R', 'i', 'c', '8841', '8611', '4077', '8251', 'e', 'T', '3415', 'H', 'o', 'O', 'b', 't', '2531', 'Q', '6537', 'l', '9475', '127']

17, 2157, 1747, 555, 26, 26, 20, 8, 9695, 4939, 11, 18, 9, 3, 8841, 8611, 4077, 8251, 5, 20, 3415, 8, 15, 15, 2, 20, 2531, 17, 6537, 12, 9475, 127