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: ['8451', 'q', 'A', '8441', 'G', '2947', 'W', '1955', 'U', '6311', 'J', 'v', 'w', 'C', '7225', 'N', 't']

8451, 17, 1, 8441, 7, 2947, 23, 1955, 21, 6311, 10, 22, 23, 3, 7225, 14, 20