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: ['6581', '2081', '4697', '155', '1805', '2557', '8547', '3805', '4381', 'r', '4751', 'C', '835', '107', 'Q', 'h', 'm', 'j', 'R', '6899', '7111', 'o', 'u', 'Q', '2555', '1227', 'B', 'b']

6581, 2081, 4697, 155, 1805, 2557, 8547, 3805, 4381, 18, 4751, 3, 835, 107, 17, 8, 13, 10, 18, 6899, 7111, 15, 21, 17, 2555, 1227, 2, 2