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', '7279', 'p', '7833', 's', 'x', '9291', 'O', 'W', '9517', '6555', '761', 'L', 'd', '5247', '9629', '299', '701', 'z', 'L', '4115', '2945', 'b', '1211', 'l', '7559', '7697', '5841', 'M', '3221', '3135', '9777', '2861', '7865', 'V', '8529', 'N', '8479', '2121', 's']

5, 7279, 16, 7833, 19, 24, 9291, 15, 23, 9517, 6555, 761, 12, 4, 5247, 9629, 299, 701, 26, 12, 4115, 2945, 2, 1211, 12, 7559, 7697, 5841, 13, 3221, 3135, 9777, 2861, 7865, 22, 8529, 14, 8479, 2121, 19