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: ['7389', 'Z', 'Y', '117', '3529', 'p', '2013', 'E', '4077', '9857']

7389, 26, 25, 117, 3529, 16, 2013, 5, 4077, 9857