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: ['y', '827', 'c', '8963', 't', 'G', '1669', '8587', 'Y', 's', '2707', 'l', '489', 'B', 'S', 'N', 'E', '2089', '8511', '3505', '1371', '1791', 'm', 'N', 'H', 'O', '1795', 'M', '8439', '3121', 'U', 'u', '7197', 'N', 'B', 'y', '4561']

25, 827, 3, 8963, 20, 7, 1669, 8587, 25, 19, 2707, 12, 489, 2, 19, 14, 5, 2089, 8511, 3505, 1371, 1791, 13, 14, 8, 15, 1795, 13, 8439, 3121, 21, 21, 7197, 14, 2, 25, 4561