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.

['C', 'S', 'C', 'T', '4187', '8575', '405', 'N', '7281']
3, 19, 3, 20, 4187, 8575, 405, 14, 7281

['a', '3105', '1321', '7035', 'B', 'z', '7297', 's', '9107', '7389', 'E', '9239', 'l', 'n', 'E', '8255', 'h', '4269', 't', 'k', 'k', 'P', 'W', 'w', '3267', '4753', '6429', '7191', '6001', 'M', 'J', 'k', '5023']
1, 3105, 1321, 7035, 2, 26, 7297, 19, 9107, 7389, 5, 9239, 12, 14, 5, 8255, 8, 4269, 20, 11, 11, 16, 23, 23, 3267, 4753, 6429, 7191, 6001, 13, 10, 11, 5023

['n', '9835', 'l', 'L', 'h', '2825', 'k', 'u', '8087', '5403', 'a', 'Y', '7747', 'i', '1899', '8653', '7291', 'n', 'm', 'r', 'J', 'w', '4913', 'A', '3929', '35', 'Y']

14, 9835, 12, 12, 8, 2825, 11, 21, 8087, 5403, 1, 25, 7747, 9, 1899, 8653, 7291, 14, 13, 18, 10, 23, 4913, 1, 3929, 35, 25