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.

['647', 'h', '6029', 'r', '7851', 'g', 'u', '9383', '4033', 'i', 'N', '3515', '9369', 'h', '8997', 'H', 'Y', 'k', '1505', 'L', 'F', '3311', '3475', 'a', '6047', '8745', '9905', '6131', '3893', '9329', 'f', '9549', '2777', '2191', '369', '3691', '489', 't', '8239', 'm']
647, 8, 6029, 18, 7851, 7, 21, 9383, 4033, 9, 14, 3515, 9369, 8, 8997, 8, 25, 11, 1505, 12, 6, 3311, 3475, 1, 6047, 8745, 9905, 6131, 3893, 9329, 6, 9549, 2777, 2191, 369, 3691, 489, 20, 8239, 13

['3527', '3843', '719', 'r', '8403', 'M', '3981', '9225', 'm', '5725', '8413', '7257', '6637', '5495', '261', '4853', 'L', 'J', '4141', 'D', '2687', '9113', '4357', 'W', 'S', '3439', 'c']
3527, 3843, 719, 18, 8403, 13, 3981, 9225, 13, 5725, 8413, 7257, 6637, 5495, 261, 4853, 12, 10, 4141, 4, 2687, 9113, 4357, 23, 19, 3439, 3

['739', '867', 'i', '5301', '1853', '8393', 'y', 'Z', '6055', 'b', '4507', 'p', '3203', '4337', '2499', 'l', 'n', 'E', 'z', '1437', '7627']

739, 867, 9, 5301, 1853, 8393, 25, 26, 6055, 2, 4507, 16, 3203, 4337, 2499, 12, 14, 5, 26, 1437, 7627