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', 'M', 'H', '447', 'j', '8349', 'w', '5441', '2317', '3949', '119', 'Q', 'A', '9175', 'p', 'N', 'Y', 'b', '1281', 'R']

3, 13, 8, 447, 10, 8349, 23, 5441, 2317, 3949, 119, 17, 1, 9175, 16, 14, 25, 2, 1281, 18