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: ['5893', '3997', 'O', '7695', 'b', '3089', '9789', 'k', 'J', '4787', '8363', 'P', '5451', 'i', '9309', '927', '1163', '7433', 'V', '6607', 'J', '1743', '647', 'k', '7155', '7061', '2017', '4231', 'y', '4561', '6951', '8797', '4977', '7807', '5805', '1011', '8753', 'I', 'l']

5893, 3997, 15, 7695, 2, 3089, 9789, 11, 10, 4787, 8363, 16, 5451, 9, 9309, 927, 1163, 7433, 22, 6607, 10, 1743, 647, 11, 7155, 7061, 2017, 4231, 25, 4561, 6951, 8797, 4977, 7807, 5805, 1011, 8753, 9, 12