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: ['s', '8053', '743', 'h', 'k', '4121', '7005', 'F']

19, 8053, 743, 8, 11, 4121, 7005, 6