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: ['7449', '8221', 'p', '5575', '8821', '5293', '9323', '3251', '1981', 'C', '1803', 'Q']

7449, 8221, 16, 5575, 8821, 5293, 9323, 3251, 1981, 3, 1803, 17