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: ['8381', 'b', 'J', 'f', '7855', 'F', '8807', 'U', 'Y', 'n', '2177', 'c', 'P', 'U', 'R', '6675', '6835', '4291', '9305', '9365', '5479', '2947', '593', '5117', 'g', '6623', 'E', '7663', 'm', '3367', '3613', '2061', 'x']

8381, 2, 10, 6, 7855, 6, 8807, 21, 25, 14, 2177, 3, 16, 21, 18, 6675, 6835, 4291, 9305, 9365, 5479, 2947, 593, 5117, 7, 6623, 5, 7663, 13, 3367, 3613, 2061, 24