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: ['r', 'J', 'e', 'h', 'N', '9963', 'V', 'E', '7225', 'S', '499', '1955', '7395', 'R', '4515', 'L', '1549', '4745', 'e', 'j', 'S', 'K', 'o', 'g']

18, 10, 5, 8, 14, 9963, 22, 5, 7225, 19, 499, 1955, 7395, 18, 4515, 12, 1549, 4745, 5, 10, 19, 11, 15, 7