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: ['e', 'y', 'U', 'o', 'K', 'J', '6831', 'W', 'N', 'N', 'k', 'a', '1611', 'y', 'J', 'X', 'Y', 'l', '7701', '2725', '8547', '6433', 'A', '7399', '4627']

5, 25, 21, 15, 11, 10, 6831, 23, 14, 14, 11, 1, 1611, 25, 10, 24, 25, 12, 7701, 2725, 8547, 6433, 1, 7399, 4627