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', 'l', '6933', 'o', '5683', '773', '5485', 'C', '7753', 'r', 'V', 'A', '3445', '7465', '185', '8129', '6785', '1737', 'I', 'r']

19, 12, 6933, 15, 5683, 773, 5485, 3, 7753, 18, 22, 1, 3445, 7465, 185, 8129, 6785, 1737, 9, 18