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: 9, 17, ['6779', '2141', 't', 'L', '5925', 'E', 'x', '1945', 'm', 'f', '4807', 'j', '3599', 'Y', 'f', 'y', '9147', '1905', '7873', '583', '4411', '9493', 'S', 'X']

SOLUTION: 9147yfY3599j4807fm

PROBLEM: 3, 4, ['d', '169', 'W', 'Y']

SOLUTION: YW

PROBLEM: 9, 13, ['B', '7077', 'R', '4943', 'b', '9755', 'H', 'm', '8553', '9817', 'D', '6685', '8143', '5701', '1903', 'w', '5405', '4233', '9571', '2173', 'K', '3613']

SOLUTION:
81436685D98178553