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: 13, 13, ['1771', 'u', 'w', 'k', 'P', '7297', 'Y', '2223', 'X', 'u', '3067', '19', 'w', 'A', 'b', '4309', 'O', '7215', 'z', '6609', '4479', '3149', '6829', '8597', '4829']

SOLUTION: w

PROBLEM: 2, 7, ['e', 's', '7009', 'z', 'I', '8649', '6405', '551', 'C', '5325', 'V', 'i', 'w', 'K', 'w', 'R']

SOLUTION: 50469468Iz9007s

PROBLEM: 10, 16, ['1807', '4513', '6579', '1931', 'L', '5337', 'k', 'l', '1619', '8753', 'g', '7639', '1677', '5419', 'Q', 'K', '6219', '4443', '9659', 'V', '7813', 'a', '1175', '6141', 'e', 'R', '2113', '4135']

SOLUTION:
KQ914577619367g3578