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: ['6823', 'A', 't', '5825', 'h', 'b', '1691', 'l', 'k', '9489', '6463', 'b', 'Z', 'W', 'y', '7733', '1169', '3075', '9549', 'O', 'b', '349', 's', 'L', 'Q', '6655', 'C', '4679', '6599', 'r', 'i', 'T', '3889', '6329', 'n', 'M', '5229', 'W', 'b', '2071']

6823, 1, 20, 5825, 8, 2, 1691, 12, 11, 9489, 6463, 2, 26, 23, 25, 7733, 1169, 3075, 9549, 15, 2, 349, 19, 12, 17, 6655, 3, 4679, 6599, 18, 9, 20, 3889, 6329, 14, 13, 5229, 23, 2, 2071