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: ['6549', 'F', '5779', '7895', 'q', '5925', '4037', 'k', '9961', '9559', 'u', '6979', '383', '6327', 't', 'K', 'x', '3179', 'q']

6549, 6, 5779, 7895, 17, 5925, 4037, 11, 9961, 9559, 21, 6979, 383, 6327, 20, 11, 24, 3179, 17