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: 1, 3, ['4181', '3741', 'Q']

SOLUTION: Q14731814

PROBLEM: 3, 6, ['p', 'H', '2775', '2567', '7787', 'D', '3807', '4817', '5399']

SOLUTION: D787776525772

PROBLEM: 7, 12, ['1769', '8093', '5115', 'R', '3229', 'z', '4491', '4875', '1519', '6915', '2303', 'b', '2773', '465', '1549', '7389', 'j', 'h', 'B']

SOLUTION:
b30325196915157841944