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: ['T', 'r', '6043', 'd', '2655', 'D', '1369', '6953', '4881', 'm', 'S', '343', 's', '777', 'Z', 'J', '1229', 'I', 'y']

20, 18, 6043, 4, 2655, 4, 1369, 6953, 4881, 13, 19, 343, 19, 777, 26, 10, 1229, 9, 25