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: ['D', 'm', 'K', 'z', 'N', '4321', '8799', '3055', '7069', 'G', 'P', '4645', 't', '8551', 'u', '385', 's', 'H', '3845', 'O', 'K', '3625', '7921', 'H', '5839', '9041']

4, 13, 11, 26, 14, 4321, 8799, 3055, 7069, 7, 16, 4645, 20, 8551, 21, 385, 19, 8, 3845, 15, 11, 3625, 7921, 8, 5839, 9041