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: 7, 12, ['4563', '7657', '4657', '1145', 'A', 'e', 'a', '5429', '3323', 'I', '569', 'R', '5013', 'U', 'v', 'l', 'h', 'z', 'e', 'D', 'n', 'h', 'h', '4673', '973']

SOLUTION: R965I32339245a

PROBLEM: 22, 23, ['6391', 'M', '8905', '3769', '9675', '4113', '9237', '8809', '8731', '1409', 'k', 'g', '6187', 'w', 'V', '2261', 'G', 'V', '2539', 'E', '2319', 'P', 'm', '8553', '6411']

SOLUTION: mP

PROBLEM: 7, 7, ['U', '5175', 'S', '7071', '7131', 'l', 'i', '1793', 'm', '8011', 'O', 'M', '1625', '3323', '5709', '6483']

SOLUTION:
i