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: ['j', 'D', '7479', 'c', 'C', '9585', '1597', '3145', 'B']

10, 4, 7479, 3, 3, 9585, 1597, 3145, 2