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: ['345', '8289', 'N', '8169', 'R', '2647', 'h', 's', 'x', '4713', 'b']

345, 8289, 14, 8169, 18, 2647, 8, 19, 24, 4713, 2