TASK 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.
PROBLEM: ['8711', 'e', '5951', 'Y', 'S', 'V', '2141', 'g', 'R', '627', '8803', 'q', '9501', '1999', 'S', '2115', 'P', '7185', 'r', 'c', 'E', 'J', '2721', 'a', 'd', '6801', '7393', '2427', '4311', 't', 'r', 'h', '3429']

SOLUTION: 8711, 5, 5951, 25, 19, 22, 2141, 7, 18, 627, 8803, 17, 9501, 1999, 19, 2115, 16, 7185, 18, 3, 5, 10, 2721, 1, 4, 6801, 7393, 2427, 4311, 20, 18, 8, 3429

PROBLEM: ['A', '5559', '2573', 'F', '8233', 'A', 'F', 'u']

SOLUTION: 1, 5559, 2573, 6, 8233, 1, 6, 21

PROBLEM: ['c', 'k', 'I', 'B', 'K', '7093', 'k', '9221', '5729', '5567', '3951', '1425', '8441', 'Y']

SOLUTION:
3, 11, 9, 2, 11, 7093, 11, 9221, 5729, 5567, 3951, 1425, 8441, 25