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: ['6953', 'b', 'q', '4389', '895', 'H', '8783']

6953, 2, 17, 4389, 895, 8, 8783