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: ['8039', 'd', '2571', 'N', '2507', '3767', 'N', 'c', 'X', 'B', 'i', 'a', 'o', 'w', '6761']

8039, 4, 2571, 14, 2507, 3767, 14, 3, 24, 2, 9, 1, 15, 23, 6761