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: ['6217', '6645', 'N', 'q', '6073', '6375', '8259', 'K', 'T', '6001', '2673', '7377', 'y', '3577', '535', '4447', 'S', 'l', 'h', 'd', '2383', 'H', '3207', 'v', '4391', '4297', '5681', 'a', '7099', 'U', 'Y', 'S', 'c', 'v', '8901', 'M', 'R', 'O', 'A']

6217, 6645, 14, 17, 6073, 6375, 8259, 11, 20, 6001, 2673, 7377, 25, 3577, 535, 4447, 19, 12, 8, 4, 2383, 8, 3207, 22, 4391, 4297, 5681, 1, 7099, 21, 25, 19, 3, 22, 8901, 13, 18, 15, 1