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: ['7277', 'Y', '3123', '1353', '8975', 't', '5639', '7911', '8559', 'm', 'v', 'm', 'G', 'Q', 'M', 'H', 'L', '8403', '9709', '193', '7967', 'O', 'k', '15', 'R']

7277, 25, 3123, 1353, 8975, 20, 5639, 7911, 8559, 13, 22, 13, 7, 17, 13, 8, 12, 8403, 9709, 193, 7967, 15, 11, 15, 18