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', 'l', '9741', '9027', 'g', '1199', '2365', 'v', 'u', '9469', 'n', '7111', 'b']

14, 12, 9741, 9027, 7, 1199, 2365, 22, 21, 9469, 14, 7111, 2