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: ['1431', 'S', 'H', 'q', '1217', 'K', '167', '8319', '4773', '7811', '9589', '6811', '9557']

1431, 19, 8, 17, 1217, 11, 167, 8319, 4773, 7811, 9589, 6811, 9557