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: 5, 11, ['4381', '7607', '3995', '7639', 'W', '2377', '2639', 'Z', 'D', '4511', 'K', '3211', '6939', 'n', 'J', 'd', '9647']

SOLUTION: K1154DZ93627732W

PROBLEM: 22, 26, ['O', '9947', '2663', '8883', 'o', '1499', 'u', 'n', 's', 'k', '4637', 'e', 'G', '8807', '6975', '3263', '4157', '8213', '5235', 'H', '4915', '7443', 'i', 'h', 'j', '6837', '983', '8793']

SOLUTION: 7386jhi3447

PROBLEM: 4, 6, ['2045', '4225', '5467', '4353', '3821', '7911', 'O', '4405', '3371', '3879', '8169', 'J', 'D', '6031', 'w', 'g', 'k', '5659', 'a', 'u', 'O', '4161', 'c', '2621', 'F']

SOLUTION:
119712833534