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: 6, 6, ['9431', '6731', 'A', '5153', 'K', '1567', 'D', 'Y', 'a', 'q', 'x']

SOLUTION: 7651

PROBLEM: 5, 25, ['8867', 'K', '315', 's', '8813', 'N', 'E', 'M', '1411', '6741', '2403', '7973', 'P', '2199', '9551', 'S', 'W', '4163', '7209', 'E', '2113', 'J', '8953', '1319', 'b', '7627', 'j', 'r', '6323', '1101']

SOLUTION: b91313598J3112E90273614WS15599912P3797304214761141MEN3188

PROBLEM: 8, 19, ['Y', '8895', '3167', 'P', '6879', 'k', '169', 'O', '9479', 'J', '8225', 'S', 'Z', 'X', 'T', 'i', '7919', 'D', 'F', 'P', 'U', '2071', '6485', '1651', 'a', 'E', '7031', 'b', '9385']

SOLUTION:
FD9197iTXZS5228J9749O