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, 16, ['G', '615', 'N', '8597', 'f', '1837', 'R', '6489', '6643', '7951', 'p', 'q', 'z', '2831', '1655', 'C', 'K', 'H', '2117', '5135', 'U', 'y', 'e', 'i', 'r', 'j', '4779', '5225']

SOLUTION: C16552831zqp795166436489

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: 20, 22, ['5791', 'I', 'N', '9857', '633', 'Q', '6275', 'k', 'x', '9257', 'E', '7671', '6361', '1273', '9699', '3415', '2521', 'W', '521', '9565', '171', 'R', 't', '3661', 'R', '655', '383', '7435', 's']

SOLUTION:
R1719565