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: ['N', '2477', 'U', 'p', 'B', 'k', '9535', '9007', 's', 'W', 'l', '1177', 'i', '1381', 's', '5111', 'M', 'F', '1507', 'q', '2441', '2419', 'M']

14, 2477, 21, 16, 2, 11, 9535, 9007, 19, 23, 12, 1177, 9, 1381, 19, 5111, 13, 6, 1507, 17, 2441, 2419, 13