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: ['8989', 'o', 'b', '5765']

SOLUTION: 8989, 15, 2, 5765

PROBLEM: ['N', '9371', '3135', 'W', 'E', '4869', 'b', '6681', '3391', '4141', '6861', '7701', 'b', '8763', '3703', 'B', 'W', '8947', 'B', '7155', 'Y', 'y', 'z', 'K', 'Y', '6099', '3165', 'X', '3159', '1145', '5153', '7131', '4001', 'R', 'z', '5499', 'r', 'O', 'b', 'W']

SOLUTION: 14, 9371, 3135, 23, 5, 4869, 2, 6681, 3391, 4141, 6861, 7701, 2, 8763, 3703, 2, 23, 8947, 2, 7155, 25, 25, 26, 11, 25, 6099, 3165, 24, 3159, 1145, 5153, 7131, 4001, 18, 26, 5499, 18, 15, 2, 23

PROBLEM: ['v', '5721', 'R', '5747', 'n', '9641', 'C', 'X', '4453', 'p', 'k', '409', '8615', 'M', '4689', 'f', 'B', 'Y']

SOLUTION:
22, 5721, 18, 5747, 14, 9641, 3, 24, 4453, 16, 11, 409, 8615, 13, 4689, 6, 2, 25