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: ['e', '5217', '715', '1711', '1555', 'a', '6763', 'k', '593', '1943', '7627', 'Y', 'D', 'K']

5, 5217, 715, 1711, 1555, 1, 6763, 11, 593, 1943, 7627, 25, 4, 11