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: ['M', 't', '1853', '9701', 'h', '2631', '5817', 'w']

13, 20, 1853, 9701, 8, 2631, 5817, 23