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', '1983', 'E', 'm', '7461', '4081', '993', '1519', '8891', 'R', 'r', 'h', 'T', 'E', '1697', 'v', '3035', '9311', 'p', '7501', '4363', '8391', '1089']

14, 1983, 5, 13, 7461, 4081, 993, 1519, 8891, 18, 18, 8, 20, 5, 1697, 22, 3035, 9311, 16, 7501, 4363, 8391, 1089