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: ['6133', 'F', 'H', '6267', 'h', '3301', '1095', '5491', '7191', '9687']

6133, 6, 8, 6267, 8, 3301, 1095, 5491, 7191, 9687