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: ['G', '835', 'U', 'b', 'e', '7913', '6641', 'B', 'V', 'w', '2855', '2135', 't', '1761', '4005', 'Z', '9497', 'a', 'u', 'X', '9483', 'p', 'p', '1051', 'k', '489', '7015', 'W', '4807', '4193', '7135', '7955', 'i', 't']

7, 835, 21, 2, 5, 7913, 6641, 2, 22, 23, 2855, 2135, 20, 1761, 4005, 26, 9497, 1, 21, 24, 9483, 16, 16, 1051, 11, 489, 7015, 23, 4807, 4193, 7135, 7955, 9, 20