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: 2, 2, ['6099', 'r']

SOLUTION: r

PROBLEM: 6, 27, ['p', '5559', 'b', '1087', '2763', 'j', 'U', 'N', '7099', '3001', 'x', 'Y', '1631', '2729', '7503', 'I', '8149', 'm', 'M', 'n', 'H', 'F', 'E', '9513', '8697', 'H', 'e', '5691']

SOLUTION: eH79683159EFHnMm9418I305792721361Yx10039907NUj

PROBLEM: 2, 2, ['w', 'e']

SOLUTION:
e

