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: 1, 2, ['k', 'A', '2153']

SOLUTION: Ak

PROBLEM: 2, 3, ['N', 'U', 'D', 'm', '9001', 'I', '2675', 'l', '2771', 'U', '1181', 'U']

SOLUTION: DU

PROBLEM: 23, 24, ['X', '9853', '1427', 'm', 'I', '6789', '9785', '4111', '553', '8947', '8241', '7303', 'n', '5809', '185', 'Q', '7331', '5377', 'R', 'h', 'w', 'u', '5485', 'P', '8355']

SOLUTION:
P5845