TASK DEFINITION: In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting string. 'i' and 'j' will be non-negative, and will always have a value less than the length of A. 'i' will always be less than 'j'. Perform the operations in order, i.e., do not reverse first and then concatenate.
PROBLEM: 8, 10, ['f', 'F', '4775', 'F', 'w', 'r', 'v', 'S', 'N', '479', 'e', 'u', 'e', 'e', '2081']

SOLUTION: 974NS

PROBLEM: 3, 21, ['V', '3661', '3743', 'Y', '3179', 'b', '7097', '3031', '5859', '4095', 'D', 'J', '2337', '4259', '2539', 'I', '9659', 'U', 'G', 'Q', '3145', '177', '9839', 'f']

SOLUTION: 5413QGU9569I935295247332JD5904958513037907b9713Y3473

PROBLEM: 3, 4, ['U', 'r', 'I', 'V', '463', '9403', 'a', '9187', 'N', 'T', 'H', 'c', '4903', 'h', 'n', '823', '9091', '3145', '1805', '2451', '1193', '5561']

SOLUTION:
VI