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: ['4367', '5139', '433', '919', '8123', '5899', 'x', 'V', '2961', 'A', 'D', '4265', '3893', 'B', 'F', '2153', 'E', '4273', '6987', 'r', 'r', 'N', 'G']

4367, 5139, 433, 919, 8123, 5899, 24, 22, 2961, 1, 4, 4265, 3893, 2, 6, 2153, 5, 4273, 6987, 18, 18, 14, 7