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: 11, 12, ['n', '8991', 'Z', '4113', '1623', '1351', 'l', 'p', 'T', '9931', '11', 'i', '1775', 'h', '7237', '8553', 'Q', 'U', '5395', '8727']

SOLUTION: i11

PROBLEM: 5, 5, ['7991', '8029', '9605', 'u', '9539', 'q', '3789', 'i', '8639', '7477']

SOLUTION: 9359

PROBLEM: 2, 8, ['9911', '239', '5533', '6321', '117', 'S', '199', 'D', 'M', 'q', 'z', 's', 'q', 'Y', 'I', 'd', 'Y', 't', '7411', '4899', '893', '6209', '7723', '583', 'e', '2301']

SOLUTION:
D991S71112363355932