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: 5, 7, ['2725', '1489', 'P', '2021', 'c', '1605', 'R', 'T', 'p', 'q', '6487', '3395', 'u', 'x']

SOLUTION: R5061c

PROBLEM: 4, 19, ['o', 'C', 'M', '9251', 'V', '369', '2559', 'w', '5883', 'u', 'b', 'x', '9009', '2981', '2803', 'F', 'j', '2593', 'p', 'D', '8019', 'M', 'W', '7003', 'D', 'B', '9037', 'h']

SOLUTION: p3952jF308218929009xbu3885w9552963V1529

PROBLEM: 3, 8, ['1515', 'v', '7559', 'H', 'n', 'k', 'X', 'W', 'R', '8555', 'L', '2721', '5853', '3121', 'u', 'i', '3709', 'o', '3231', '8325', 'h', 'W', '2489']

SOLUTION:
WXknH9557