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: ['j', 'l', 'c', '1593', '2627', 'x', 'c', 'K', '4709']

10, 12, 3, 1593, 2627, 24, 3, 11, 4709