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: ['9463', 'Z', '9059', '5839', '8581', '8707', 'T', '493', 'D', 'B', 'L', 'S', '563']

9463, 26, 9059, 5839, 8581, 8707, 20, 493, 4, 2, 12, 19, 563