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: ['353', '3445', 'W', '643', '2159', 'D', 'P', '8953', '8415', 'h', '1375', 'g', '7691', 'p', '5715', '4169', 'y', '3301', '467', 'F', 'E', 'n', 'N', 'D', '7589', '1939', 'G', 'f', 'A', 'N', 'l', 'b', '8951', 'b', 'H', '7365', 'A', '1667']

353, 3445, 23, 643, 2159, 4, 16, 8953, 8415, 8, 1375, 7, 7691, 16, 5715, 4169, 25, 3301, 467, 6, 5, 14, 14, 4, 7589, 1939, 7, 6, 1, 14, 12, 2, 8951, 2, 8, 7365, 1, 1667