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: ['h', 'y', 'Y', '879', 'N', '8277', '5433', '9091', '5723', 'v', '7273', 'N', 'R', 'K', 'l', '4535', '1603', 'c', 'Z', '1475', '2751', 'B', '5251', '9377', 'r']

8, 25, 25, 879, 14, 8277, 5433, 9091, 5723, 22, 7273, 14, 18, 11, 12, 4535, 1603, 3, 26, 1475, 2751, 2, 5251, 9377, 18