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: ['3369', '5973', 'C', '2297', '2679', '9117', 'd', 't', '809', 'j']

3369, 5973, 3, 2297, 2679, 9117, 4, 20, 809, 10