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: ['2189', 'y', '769', '375', 'L', '8151', '3815', 'c', '7279', '7357', 'p', '6245', '8999', 'x', '1239', 'J', 'd', '9465', '3365', 'q', 'r', 'v', '6061', '9837', 'L', 'c', 'e', '9489', 'H', '9615']

2189, 25, 769, 375, 12, 8151, 3815, 3, 7279, 7357, 16, 6245, 8999, 24, 1239, 10, 4, 9465, 3365, 17, 18, 22, 6061, 9837, 12, 3, 5, 9489, 8, 9615