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: ['j', 'Z', 'i', '3777', 'j', '9241', '8247', '6525', 'a', '3957', '8917', '1369', 'a', 'B', 'p', '7653', 'k', '235', 'p', 'C']

10, 26, 9, 3777, 10, 9241, 8247, 6525, 1, 3957, 8917, 1369, 1, 2, 16, 7653, 11, 235, 16, 3