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: ['3699', '4959', 'H', '7469', 'D', '9379', '6365', 'q', 'P', 'a', 'Z', '6693', '9889', '1977', 'g', '4601']

3699, 4959, 8, 7469, 4, 9379, 6365, 17, 16, 1, 26, 6693, 9889, 1977, 7, 4601