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: ['715', 'q', 'M', '9895', '4299', 'w', '8301', 'Y', '7921', 'd', '691']

715, 17, 13, 9895, 4299, 23, 8301, 25, 7921, 4, 691