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: ['B', '3001', 'T', '681', 'P', 'V', '8787', 'h', '4151', '6589', '4589']

2, 3001, 20, 681, 16, 22, 8787, 8, 4151, 6589, 4589