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: ['m', 'E', '655', 'E', 'M', 'E', 'k', 'u', 'p', 'd', 'U', 'd', 'b', '8597', '1859', '8537']

13, 5, 655, 5, 13, 5, 11, 21, 16, 4, 21, 4, 2, 8597, 1859, 8537