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, ['9007', '2291', '1683', 'f', 'k', 'K', '6167', 'l', 'v', 'a', '2959', 'u', 's', '5411', 'f', 's', 'I', '2725', 'k', 'D']

SOLUTION: su9592av

PROBLEM: 2, 14, ['35', 'w', 'N', 'C', 'l', '9715', '8003', '9111', '6737', '5455', '5365', '859', '5979', 'U', 's', 's', '9599', 'g', '4577', '527', 'V', '5979']

SOLUTION: U9795958563555457376111930085179lCNw

PROBLEM: 5, 9, ['U', 'm', '9917', '8087', '8563', 'P', '9827', 'R', 'p', '1353', '5613', 'G', '5291', '3989', '5443', 'G', '2103']

SOLUTION:
pR7289P3658