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.

['O', '6049', '4915', '1573', '719', '2061', 'O', 'n', '6689', 'J', '4985', 'r', 'q', '6617', 'k', '2333', '183', '4549', '6053', '1075', '737', '6465', '5421']
15, 6049, 4915, 1573, 719, 2061, 15, 14, 6689, 10, 4985, 18, 17, 6617, 11, 2333, 183, 4549, 6053, 1075, 737, 6465, 5421

['179', 'f', '7909', '9959', '3649', 'B', 'k', 'I', 's', 'Y', 'a', '6619', '3657', 'G', 'Q', '3647']
179, 6, 7909, 9959, 3649, 2, 11, 9, 19, 25, 1, 6619, 3657, 7, 17, 3647

['w', 'l', '9423', '95', 'L', 'v', '7959', '3603', 'L', 'h', '9855', 'U', '4527', 'M', 'm', 'l', 'U', 'N', '9005', 'I', 'j', '7933', 'Z', '3789']

23, 12, 9423, 95, 12, 22, 7959, 3603, 12, 8, 9855, 21, 4527, 13, 13, 12, 21, 14, 9005, 9, 10, 7933, 26, 3789