TASK DEFINITION: In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
PROBLEM: 11, 15, ['807', '2753', 'L', '8633', '7203', 'j', 'a', 'r', 'R', 'q', 'g', 'B', 't', '1373', '3371', 'S', '9977', 'y']

SOLUTION: 17333731tBg

PROBLEM: 5, 14, ['S', '4231', '6377', '4559', '8213', '2583', 'Z', '3547', '4007', 'm', 'Z', '3671', '6455', '9961', 'm', '8539', '8627', '7379', 'q', '6557', '1469', 'G', '321', 'C', '5671', 'p', 'E', 'h']

SOLUTION: 169955461763Zm70047453Z38523128

PROBLEM: 6, 13, ['8759', 'f', '2449', '3695', 'P', '3051', 'M', 'T', '6901', '5931', '1713', '8573', '6647']

SOLUTION:
74663758317113951096TM1503