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', 'c', '8031', '1513', '9917', 'D', '505', 'e', '6359', '1667', 'b', 'R', 'O', 'P', 'E', '1511', '3711', 'm', 'i', 'h', 'c', 'n', '1433', 'Q', 'U', '1653', '6125']

14, 3, 8031, 1513, 9917, 4, 505, 5, 6359, 1667, 2, 18, 15, 16, 5, 1511, 3711, 13, 9, 8, 3, 14, 1433, 17, 21, 1653, 6125