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: ['D', 'Z', '2607', '2485', 'e', 'T', '1513', '365', '6687', '6537', 'Z', 'V', 'm', 'E', 'b', '4367', '6349', '7545', '461', 's', '7075', 'B', '8447', '4589']

4, 26, 2607, 2485, 5, 20, 1513, 365, 6687, 6537, 26, 22, 13, 5, 2, 4367, 6349, 7545, 461, 19, 7075, 2, 8447, 4589