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: ['G', 'K', '6219', 'h', 'A', '2387', 's', 'l', '8601', '1347', 'K', '7953', '267', 'O', 'O', '2353', 'H', '6411', 'U', '4325', 'p', 'B', 'R', '8823', 'A', 'B', 'c', '2381', 'U', 'O', 'q']

7, 11, 6219, 8, 1, 2387, 19, 12, 8601, 1347, 11, 7953, 267, 15, 15, 2353, 8, 6411, 21, 4325, 16, 2, 18, 8823, 1, 2, 3, 2381, 21, 15, 17