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: 8, 21, ['2943', 'u', '4551', 'A', '2429', 'o', 'L', '1565', 'a', 'X', '7355', 'R', 'T', '6539', '9603', '967', 'l', '1715', '3931', '5387', '7197', '435']

SOLUTION: 7197538739311715l96796036539TR7355Xa1565

PROBLEM: 9, 18, ['p', '5557', 'r', 'I', 'k', '4673', '5355', '3105', 'm', '6655', '1505', '2413', '7439', 'b', 'K', '7053', '2385', '8935', '9949', '5351', '4423', 'y', 'p', '7891', 'A', '1271', 'o', 'z']

SOLUTION: 893523857053Kb7439241315056655m

PROBLEM: 11, 20, ['4881', '8409', 'S', '4771', 'j', 'a', 'g', 'j', '5633', '2483', 'J', 'W', '1399', 't', '2689', 'U', 'E', '8411', 't', '3535', 'h', '9827', 'T', '9409', 'C', 'e', 'd']

SOLUTION:
3535t8411EU2689t1399WJ