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: 3, 6, ['e', 'w', '503', '2677', '4099', 'F', '4781', '3995', '8221', 'z', '6689', 'L', '3821', 'b', 'A', 'P', '4037', 'v', 'M', '3919']

SOLUTION: F99047762305

PROBLEM: 4, 5, ['8055', '701', 'J', '7719', 'w', '1403', 'p', '7939', 'N', '7599', 'B', '5797', 'v', 'x', 'B', '5093', '2315', 'f', 's', '6103', '1891', '329', 'p', 'U', '4761', '815', '735']

SOLUTION: w9177

PROBLEM: 9, 9, ['d', '3167', '6657', '8875', 'b', '9067', '1085', 'Z', 'G', '8805', 'u', 'V', 'c', '1113', '9883', '9161']

SOLUTION:
G