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: ['o', '8561', 'b', 'Y', 'p', 'x', 'p', 'U', '4423', 'g', 'P', 'B', 'h', '2195', 'x', 'b', 'j', 'f', 'f', '5873', 'b', '1281', '7425', '1975', 'j']

15, 8561, 2, 25, 16, 24, 16, 21, 4423, 7, 16, 2, 8, 2195, 24, 2, 10, 6, 6, 5873, 2, 1281, 7425, 1975, 10