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: ['7711', 'C', '1549', '3111', 'U', 'P', 'e', '1449', '237', '8739', 'L', 's', 'w', 'q', 'p', '2235', 'N', '2923', 'T', 'd', '4709', '7463', '5509', 'y', '5761', '2179', '5561', '3399', 'Y', 'r', 'X', '3277', 'x', '6859']

7711, 3, 1549, 3111, 21, 16, 5, 1449, 237, 8739, 12, 19, 23, 17, 16, 2235, 14, 2923, 20, 4, 4709, 7463, 5509, 25, 5761, 2179, 5561, 3399, 25, 18, 24, 3277, 24, 6859