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: ['v', '6447', '4007', '8535', 'Z', 'e', '9175', 'P', '6995']

22, 6447, 4007, 8535, 26, 5, 9175, 16, 6995