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', '2523', '7431', '5663', '5821', '5905', 'G', '7459', '1807', '5729', 'M', 'K', '421', 'A', '6145', 'n', '4007', 'c', '389', '4807', '1205', 'v']

14, 2523, 7431, 5663, 5821, 5905, 7, 7459, 1807, 5729, 13, 11, 421, 1, 6145, 14, 4007, 3, 389, 4807, 1205, 22