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, 11, ['5797', 'D', '289', 'D', '2703', '2975', 'o', 'd', '2433', 'c', 'P', 'B', '2247', '4535', '9153', 'J', '1141', '6809', '2473', 'o', 'h', '4577', 'p', 'D', '3801', '4679', 'B']

SOLUTION: Pc3342do57923072D982

PROBLEM: 14, 18, ['685', 'F', 'O', 'A', '1179', '5015', '4467', 'O', 'q', 'i', '4613', 't', '5519', '411', 'J', 'U', 'O', 'u', '6281', '3915', 'u', '1883', 'h', 'Z', 'p', 'T', '9131', '2625']

SOLUTION: uOUJ114

PROBLEM: 14, 20, ['993', 'h', '1547', '3175', '7625', 'R', '6147', '8383', 'N', 'E', '5345', 'R', '8387', '9063', '9881', '3493', '5689', 'j', 'U', '7081', 'x', 'h', '1401', '1881']

SOLUTION:
1807Uj9865394318893609