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: ['323', 'I', '8313', '8435', '7371', 'h', 'H', '9345', '6199', 'z', 'u', '5641']

323, 9, 8313, 8435, 7371, 8, 8, 9345, 6199, 26, 21, 5641