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: ['377', 'G', '9263', 'Q', '2129', 'B', 'o', '449', 't', 'h', 'M', '9411']

377, 7, 9263, 17, 2129, 2, 15, 449, 20, 8, 13, 9411