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: 10, 14, ['8619', '1037', '6899', '8381', 's', '6757', 'a', '7261', '951', '3047', 'r', 'W', 'O', '31', '2943', '2351', '7637', '8501', 'K', '9131', '599', 'G', 'k', 'a', '8299', 'S', 'G']

SOLUTION: 13OWr7403

PROBLEM: 15, 22, ['G', 's', '7033', '8179', 'S', 'd', 'u', 'P', '2255', 'h', 'B', '7603', '5081', 'C', '5645', 'I', '1659', '8069', 'x', '3201', '2035', 'j', '9279', 'l', 'Y', 'm', '9143', '2885', 'n']

SOLUTION:
j53021023x96089561I5465