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: ['C', '3265', '4751', 'w', 'I', '2037', 'F', '3373', '7679', '8257', '1127', 'L', '8385', '7887', '8407', '9715', '8477', '3207', '5555']

3, 3265, 4751, 23, 9, 2037, 6, 3373, 7679, 8257, 1127, 12, 8385, 7887, 8407, 9715, 8477, 3207, 5555