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: ['9145', 'i', 'p', 'i', 'A', 'V', '4633', 'w', '4727', '1309', 'A', 'r', '6663']

9145, 9, 16, 9, 1, 22, 4633, 23, 4727, 1309, 1, 18, 6663