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: 7, 18, ['s', 'a', 'q', '6573', '7757', '7229', '9149', '7563', '2171', 'L', 'F', 'S', '4337', '3071', 'Q', 'A', '6987', '2529', '2489', 'y', '359', '3065', 'h']

SOLUTION: 92527896AQ17037334SFL171236579419

PROBLEM: 7, 13, ['7915', '4165', '3607', '1539', 'n', '2983', 'J', '5271', '2781', '8021', '7385', 'L', 'o', 't', 'n', '8705', 'W']

SOLUTION:
oL5837120818721725J