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, 5, ['1817', '3607', 'J', 'p', 'H', '639', '601', 'f', '8613', 'q', '1999', '4447', 'g', '8449', '1125', '1103', 'Y', 'p', 'Z', '5707', 'p', 'Q', 'a', '3889', 'Z', '5393', 'd', '9023', '4153']

SOLUTION: HpJ70637181

PROBLEM: 1, 4, ['I', '5919', 'J', '6387']

SOLUTION: 7836J9195I

PROBLEM: 5, 24, ['r', '2497', 'O', 'u', '511', '9959', 'Z', '517', '9945', '5667', '6501', 'i', '6589', 'c', 'v', '5305', '4889', 'W', 'j', 't', 'A', 'W', 'L', 'T', '8379', 'x', 'j', 'I', '4509', '7467']

SOLUTION:
TLWAtjW98845035vc9856i105676655499715Z9599115