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: 7, 17, ['j', '4189', 'N', 'y', 'K', '411', '7999', '8761', '3647', '2651', '805', 'e', 'K', 't', '2753', 'G', '9047']

SOLUTION: 7409G3572tKe5081562746316789997

PROBLEM: 6, 27, ['p', '5559', 'b', '1087', '2763', 'j', 'U', 'N', '7099', '3001', 'x', 'Y', '1631', '2729', '7503', 'I', '8149', 'm', 'M', 'n', 'H', 'F', 'E', '9513', '8697', 'H', 'e', '5691']

SOLUTION: eH79683159EFHnMm9418I305792721361Yx10039907NUj

PROBLEM: 1, 5, ['3427', 'B', '1243', 'd', 'I', 'F', 'e', 'B', 'g', '1919', '705']

SOLUTION:
Id3421B7243