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: 3, 15, ['O', 'X', 'Y', '8437', 'O', 'P', '5727', 'S', 'S', 'X', 'p', 'X', 'v', 'C', 'P', 'C', '9615', '2595', '4587', '6235', '557', '2491', 'p', '7927', 'f', '4643', '1519']

SOLUTION: PCvXpXSS5727PO8437Y

PROBLEM: 6, 7, ['y', '4445', 'k', 'E', '2737', '8341', '1781', 'g', '9877', '1835', 'P', 'i', 'd', 'G', 'j', 'h', 'N', 'L', '2427', 'w', '4785', '8087', '7069', 'A', '7411', '4355', '8529']

SOLUTION: 17818341

PROBLEM: 21, 26, ['r', 'm', 'V', 'T', '5323', '8019', 'c', '5337', '1581', '7075', '4015', 'C', 'r', '8205', 'b', 'H', '7649', '1473', 'D', 'G', '5619', '2601', '7021', 'X', '7273', '8709', '7583', '3927', 'd']

SOLUTION:
87097273X702126015619