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, 6, ['Q', 'C', '3939', '5659', '6505', '2527', '2785', 'H', '2359', '925', '921', 'f', '1597', '7131', 'B', '3075', '9017', 'T', '8723', '2717']

SOLUTION: 252765055659

PROBLEM: 5, 13, ['k', '4885', 'X', '2139', 's', 'l', '9463', 'Q', 'X', '3183', '2857', '1663', '7757', '5269']

SOLUTION: 7757166328573183XQ9463ls

PROBLEM: 7, 25, ['2951', '7349', '5659', '873', '2215', 'B', 'H', '6251', '4361', '4445', 'Z', '161', '963', '3349', '4597', '8765', 'N', 'a', '4247', '7931', 'L', 'v', 'z', 'G', '815', 'z', '5145', 'q']

SOLUTION:
815GzvL79314247aN876545973349963161Z444543616251H