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: ['961', 'y', '4697', 'b', 'W', 'V', 't', '1681', 't', 'Z', 'r', '2873', 't', 'Z', '2957', 'x', '3853', 'g', 'E', '9307', '7649']

961, 25, 4697, 2, 23, 22, 20, 1681, 20, 26, 18, 2873, 20, 26, 2957, 24, 3853, 7, 5, 9307, 7649