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: ['3905', 'D', 'P', 'D', '897', 'h', '9827', 'L', '4539', 'H', '3189', '3825', '1051', 'o', 'M', 'R', '5761', 'z', '7227', 'p', '3537', 'l']

3905, 4, 16, 4, 897, 8, 9827, 12, 4539, 8, 3189, 3825, 1051, 15, 13, 18, 5761, 26, 7227, 16, 3537, 12