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: ['r', 'K', '7807', 'l', 'Q', '5767', '8145', '9429', 'F', 'c', '1417', '5773', '3569', 'C', 'b', '381', '9995', 'X', 'r', '477', 'S', '3729', '2865', 'Q', 'L', '6775', '4279', '9773', 'V', 's']

18, 11, 7807, 12, 17, 5767, 8145, 9429, 6, 3, 1417, 5773, 3569, 3, 2, 381, 9995, 24, 18, 477, 19, 3729, 2865, 17, 12, 6775, 4279, 9773, 22, 19