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: ['j', 'L', 'U', '655', '593', '1199', '9313', '2167', 'x', 'W', 'T', 'T', 'u', '4197', '7531', 'E', '7323', '873', 'c', 'S', '4261', 'D', 'O', '2555', '6487', 'c', '9855', 'P', 'D', 'w', '5875', 'P']

10, 12, 21, 655, 593, 1199, 9313, 2167, 24, 23, 20, 20, 21, 4197, 7531, 5, 7323, 873, 3, 19, 4261, 4, 15, 2555, 6487, 3, 9855, 16, 4, 23, 5875, 16