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: ['L', '9821', 'k', '4663', 'v', 'r', 'N', 'I', 'x', '9133', 'I', 'o', 'n', '6159', 'g', 'U', '5579', 'Y', 't', 'a', 'A']

SOLUTION: 12, 9821, 11, 4663, 22, 18, 14, 9, 24, 9133, 9, 15, 14, 6159, 7, 21, 5579, 25, 20, 1, 1

PROBLEM: ['W', '985', 'N', 'w', '3923', 'J', 'D', 'M', '9409', 'h', 'Q', '5549', 'Q', '3901', 'y', '1885', '2033', '2695', '1469', 'H', '6489', 'J', 'n', 't', '9203', '4371', '25', 'T', '9249']

SOLUTION: 23, 985, 14, 23, 3923, 10, 4, 13, 9409, 8, 17, 5549, 17, 3901, 25, 1885, 2033, 2695, 1469, 8, 6489, 10, 14, 20, 9203, 4371, 25, 20, 9249

PROBLEM: ['7765', 'l', '6389', '9897', '4151', '2901']

SOLUTION:
7765, 12, 6389, 9897, 4151, 2901