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: ['9961', 'Y', '669', '8227', 'j', 'c', '8749', 'c', 'K', '8439']

SOLUTION: 9961, 25, 669, 8227, 10, 3, 8749, 3, 11, 8439

PROBLEM: ['1705', '2311', 'l', 't', '9673']

SOLUTION: 1705, 2311, 12, 20, 9673

PROBLEM: ['9775', 's', '1893', 'x', 'n', '5183', '1031', 'g', 'T', 's', '3273', 'H', 'h', 'Y', 'C', '7159', '2421', '1659', 'K', '4939', 'Y', 'I', 'S', 'm', 'f', '8243', 'y', '9917', '9575', 'm', 'S']

SOLUTION:
9775, 19, 1893, 24, 14, 5183, 1031, 7, 20, 19, 3273, 8, 8, 25, 3, 7159, 2421, 1659, 11, 4939, 25, 9, 19, 13, 6, 8243, 25, 9917, 9575, 13, 19