TASK DEFINITION: In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
PROBLEM: 16, 20, ['7675', 'c', '9729', '8219', 'P', '9939', '9217', 'C', '4067', '549', 'g', 'w', '3793', 'I', 'U', 'R', 'S', '2615', 'h', 'M', '889']

SOLUTION: Mh2615SR

PROBLEM: 6, 15, ['7417', 'a', '479', 'E', '1575', '6937', '4649', '9879', '9875', 'c', '1671', 'K', '3773', '6999', 'J', '9889', 'q', '4099', 'r', '1859', 'W']

SOLUTION: J69993773K1671c9875987946496937

PROBLEM: 4, 9, ['H', '4571', '9481', '1037', '5657', '9901', 'O', 'R', '2811', '7113', '6523', '9949', '9155']

SOLUTION:
2811RO990156571037