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: ['n', 'J', '1947', '5543', 'Y', '8099', '9885', '8979', '6649', '9765', '4059', '8651', '9303', 'h', 'C', 'G', '2347', 'n', 'i', '9301']

14, 10, 1947, 5543, 25, 8099, 9885, 8979, 6649, 9765, 4059, 8651, 9303, 8, 3, 7, 2347, 14, 9, 9301