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: ['N', '1865', 'B', '1519', 'X', '4861', 'Y', '2131', '3577', 'V', 'k', '4131', '7379', '6631', 't', 'r', 'k', 'q', 'e', 'x', '3573', 'b', '1799', 'x', '7419', 'w', '8539', '3565', '5115', 'r', 'x', '5873', 'P', '5403', '15', '4291', '2793']

14, 1865, 2, 1519, 24, 4861, 25, 2131, 3577, 22, 11, 4131, 7379, 6631, 20, 18, 11, 17, 5, 24, 3573, 2, 1799, 24, 7419, 23, 8539, 3565, 5115, 18, 24, 5873, 16, 5403, 15, 4291, 2793