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: ['c', 'a', '3803', 'p', '4967', '1779', '8395', '7399', 'G', 'l', 'w', 'H', 'F', '5019', '6421', 'S', 'y', '7797', '6957', 'R', '5661', 'I', 'p']

SOLUTION: 3, 1, 3803, 16, 4967, 1779, 8395, 7399, 7, 12, 23, 8, 6, 5019, 6421, 19, 25, 7797, 6957, 18, 5661, 9, 16

PROBLEM: ['8363', 'u', '5191']

SOLUTION: 8363, 21, 5191

PROBLEM: ['P', 'u', 'b', 'E', '5719', 'l', '4621', 'Q', 'V', '2165', 'e', 'V', '125', '1497']

SOLUTION:
16, 21, 2, 5, 5719, 12, 4621, 17, 22, 2165, 5, 22, 125, 1497