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: ['3177', 'X', 'r', 'L', 'B', 'g', 'M', '1533', 'D', 'Y', 'M', '9081', '8283', 'a', '7143', '4099', 'L', 'i', '5861', 'y', 'n', 'd']

3177, 24, 18, 12, 2, 7, 13, 1533, 4, 25, 13, 9081, 8283, 1, 7143, 4099, 12, 9, 5861, 25, 14, 4