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: ['7727', '4745', '4927', '9591', 'l', 'y', 'M', 'S', 'g', 'l', 'n', '1671', 'N', '2069', '4903']

7727, 4745, 4927, 9591, 12, 25, 13, 19, 7, 12, 14, 1671, 14, 2069, 4903