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, 8, ['n', '9001', 't', 'e', 'W', '2287', 'f', '2735', 'z', '3065', 'J', '5609', 'e', 's', 'F']

SOLUTION: 5372

PROBLEM: 5, 7, ['u', '3017', '4149', 'z', '9231', 'C', '7461', 'e']

SOLUTION: 1647C1329

PROBLEM: 23, 26, ['5811', '3851', '6209', '5071', '1151', 'N', 'i', 'l', '1363', 'g', 'C', '7527', '9991', 's', '477', 'z', 'U', '3477', 'W', 'a', 'Q', 'z', '625', 'G', 'G', 'a', 'C', '2541', '6291', '7745']

SOLUTION:
aGG526