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: ['p', '3637', 'h', 'u', 's', '9655', '9135', '559', '7747', 'm', '6299']

16, 3637, 8, 21, 19, 9655, 9135, 559, 7747, 13, 6299