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: ['6113', 'c', '1211', 'P', 'w', 'U', '1965', 'K', '7005', 'P']

6113, 3, 1211, 16, 23, 21, 1965, 11, 7005, 16