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: ['L', 'r', 'c', '8455', 'G', '2585', '4941', 'T', 'R', 'l', 'U', '8325', '8627', 'e', 'm', 'k', 'L', 'f', '9989', 'N', '5691', '5057', 'A', 'u', 'c', 'K', '9461', '2891', 'S', 'O', 'J', 'y', 'e']

12, 18, 3, 8455, 7, 2585, 4941, 20, 18, 12, 21, 8325, 8627, 5, 13, 11, 12, 6, 9989, 14, 5691, 5057, 1, 21, 3, 11, 9461, 2891, 19, 15, 10, 25, 5