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: ['3471', 'x', 'S', '2577', 'L', 'g', '8279', 'z', '4747', 's', '2427', 'S', 'T', 'M', 'J', 't', 's', '3483', 'V']

3471, 24, 19, 2577, 12, 7, 8279, 26, 4747, 19, 2427, 19, 20, 13, 10, 20, 19, 3483, 22