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: ['7131', '6705', 'y', '7185', '607', '3899', '9699']

7131, 6705, 25, 7185, 607, 3899, 9699