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: ['1945', '9679', 'T', 'K', 'A', 'i', 'c', '2017', '335', 'x', '1947', 'c', 'd', 'i', 'W', 'j', '8225', 'o', 'O', 'c']

1945, 9679, 20, 11, 1, 9, 3, 2017, 335, 24, 1947, 3, 4, 9, 23, 10, 8225, 15, 15, 3