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: 3, 3, ['6041', '1503', 'z', '6947', 'W', '3563', '6477', 'h', '8977', 'e', 'z', '5605', '3595', '9327', 'M', 'l', 'j', 'P', 'D', 'h', 'S', 'Q', 'o', '2539', 'a', 'J', 'd', 'k']

SOLUTION: z

PROBLEM: 7, 8, ['9287', 'V', 't', 'W', 'W', 'w', 'N', 'T', 'Y']

SOLUTION: TN

PROBLEM: 4, 18, ['R', 'G', '9597', '3065', '8469', '7487', '6237', 'a', 'N', '9563', 'a', 'h', 'L', '4027', 'f', '3387', 'm', 'P']

SOLUTION:
Pm7833f7204Lha3659Na7326784796485603