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: ['859', '3249', 'x', '1373', 'd', 'n', '8667', 'Z', 'w', '1791', 'h', '4511', '1829', 'k', 'o', '4485', 'C', '7677', 'P', '4663', 'F', '3943', '1807', 'L', 'Y', 'W', 'l', 'Z', 'a', 'Z', 'j', '7693', '4215', 'N', 'N', 'O']

859, 3249, 24, 1373, 4, 14, 8667, 26, 23, 1791, 8, 4511, 1829, 11, 15, 4485, 3, 7677, 16, 4663, 6, 3943, 1807, 12, 25, 23, 12, 26, 1, 26, 10, 7693, 4215, 14, 14, 15