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: ['z', '2585', '7783', '7317', '4167', 'T', 'f', '2127', '6741', 'G', '1727', '7937', '637', '2357', 'Q', '6889']

26, 2585, 7783, 7317, 4167, 20, 6, 2127, 6741, 7, 1727, 7937, 637, 2357, 17, 6889