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: ['K', 'm', '5787', '9937', 'p', '9317', 'y', '4745', '761', 'g', 'b']

11, 13, 5787, 9937, 16, 9317, 25, 4745, 761, 7, 2