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: ['p', 'y', '1519', 'M', '8889', 'v', '5719', '9733', 'C', 'X', 't', '1351', '5911', '2619', 'm', '2799', '9583', 'd', 'f', '591', 'Q', 'P', 'q', '3821', '9101', 'B', 'z', 'p', '9009', '6265', '1293', 'q', '6385', 'G', 'c', '1419', '8239', '5419']

16, 25, 1519, 13, 8889, 22, 5719, 9733, 3, 24, 20, 1351, 5911, 2619, 13, 2799, 9583, 4, 6, 591, 17, 16, 17, 3821, 9101, 2, 26, 16, 9009, 6265, 1293, 17, 6385, 7, 3, 1419, 8239, 5419