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: ['q', '8519', 'T', '6859', '5397', '3753', '2057', '5723', 'T', 'R', '7807', 'h', '9507', '7865', '8513', '2309', 'j', 'n', 'P', 'a', '8971', 'U', '7927', '875', '3315', 'E', 't']

SOLUTION: 17, 8519, 20, 6859, 5397, 3753, 2057, 5723, 20, 18, 7807, 8, 9507, 7865, 8513, 2309, 10, 14, 16, 1, 8971, 21, 7927, 875, 3315, 5, 20

PROBLEM: ['3345', '6477', 'H', '4143', 'E', 'g', '1607', '1405', '4485', '207', '3191', '2335', '6759', 'Z', '2385', '9181', 'I', '3283', '8735']

SOLUTION: 3345, 6477, 8, 4143, 5, 7, 1607, 1405, 4485, 207, 3191, 2335, 6759, 26, 2385, 9181, 9, 3283, 8735

PROBLEM: ['7949', '8047', 't', '9913', 'd', '8641', 'n', '8383', '7493', '8819', '6981', 'n', '6287', '8685', 'b', '7535']

SOLUTION:
7949, 8047, 20, 9913, 4, 8641, 14, 8383, 7493, 8819, 6981, 14, 6287, 8685, 2, 7535