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: 4, 5, ['5837', 'M', 'H', '4703', 'K', 'k', 'P', 'f', '2471', '9617', '453', '9105', 'w']

SOLUTION: K4703

PROBLEM: 5, 18, ['u', '3123', 'g', 'r', 'M', '559', 'F', 'F', '3229', '3207', 'w', 'X', 'U', 'j', 'f', 'p', '7623', '6121', '2279', 'v']

SOLUTION: 61217623pfjUXw32073229FF559M

PROBLEM: 8, 17, ['6041', 'H', 'c', 'd', '509', '3957', '8001', 'a', '4639', 'Z', '5607', 'c', '9', '9741', 'U', '4659', 'T', '8199']

SOLUTION:
T4659U97419c5607Z4639a