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: 4, 4, ['675', 'e', 'A', 'H', 'O', 'E', 'g', 'j', 'j', '5167', '2367', 'u', 'E', '753', 'M']

SOLUTION: H

PROBLEM: 2, 6, ['2245', 'H', 'X', '339', '4389', '5331', '6865', '4541', '4845', '6071']

SOLUTION: 13359834933XH

PROBLEM: 18, 18, ['261', '6815', 'w', '4943', 'b', 'B', '1121', 'p', '2979', 'x', 's', '2555', 'f', 'F', 'C', '1889', 'w', 'm', '3205', '6815']

SOLUTION:
m