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: ['1685', '1465', 'A', '593', 't', '333', 'r', 'S', 'V', '5313', 'P', 'y', '3737', '1295', 'R', 'U', 'E', 'h', 'A', '7657', 'a', 'n', '8469', '8637', '5203', '5437']

1685, 1465, 1, 593, 20, 333, 18, 19, 22, 5313, 16, 25, 3737, 1295, 18, 21, 5, 8, 1, 7657, 1, 14, 8469, 8637, 5203, 5437