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: ['q', '6249', 'E', 'f', '413', '265', 'q', '5189']

17, 6249, 5, 6, 413, 265, 17, 5189