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: 2, 4, ['9669', '8783', '8485', 'w', 'U', '4489', '1573', '6015', 'p', '1533', 'X', '3123', 'y', 'X', '4921', 'p', 'K', '9841', '8639', '1953']

SOLUTION: w84858783

PROBLEM: 2, 11, ['d', 'd', '3453', '8245', '6639', '3287', '5797', '3497', '1017', '4911', 'H', 'c', '5347', 'W']

SOLUTION: H49111017349757973287663982453453d

PROBLEM: 4, 11, ['891', '1153', '2075', 'b', '7919', '5333', '2615', '5451', '3917', '8585', '2071', 'd', 'e', '6761', '1573', '8801', 'v', '4043', '2661', 'M', '6251', '7765']

SOLUTION:
2071858539175451261553337919b