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: ['d', '6877', 'a', '6895', '5547', 'G', 'v', 'u', 'T', 'z', '2951', 'p', 'F']

4, 6877, 1, 6895, 5547, 7, 22, 21, 20, 26, 2951, 16, 6