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: 1, 2, ['7921', 'Q']

SOLUTION: Q7921

PROBLEM: 3, 9, ['I', 'L', 'k', '543', 'R', 'D', 'B', '9659', '7595', 'O', '8599', 'p', 'x', '7577', '2979', '8467', 'w', 'Q', '8385', '133', '675', '7447', 'l', 'J', '7157']

SOLUTION: 75959659BDR543k

PROBLEM: 17, 20, ['1279', 'I', '1913', 'J', '6601', '741', '443', '8669', '5085', '2753', 'g', '3807', '3337', '6377', 'a', 'I', '3603', 'U', '5277', '5939', 'L', '3669']

SOLUTION:
59395277U3603