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: 9, 13, ['z', '2819', '4327', 's', '9271', '3601', '2475', 'L', '7129', '7513', '6649', '9333', '9507', '2411', 'L', '1905', '7315', '6663', '4511', 'h', 'h', '4345', 'd', 'I']

SOLUTION: 70593339946631579217

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

SOLUTION: TN

PROBLEM: 9, 14, ['M', 'n', '8925', 'e', 'V', '225', '513', '2655', '7161', '8617', '2699', 'j', '1997', 'y', 'J', '697', '2591']

SOLUTION:
y7991j996271681617