instruction:
In this task, you are given inputs i, j, and A, where i and j are integers and A is a list. You need to find all elements of A from the ith element to the jth element, reverse the order in which they occur, and then concatenate them to output the resultant 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 concatenate the elements and then reverse the string.
question:
5, 21, ['J', '6557', '5301', '3201', '9347', '9131', '343', '683', 'A', 'c', '335', '6901', '4769', '6013', '4753', 'e', 'B', 'Q', '815', '9515', 'b', 'L', '8979', '8995', 'h', '479', '4793', '8573', '7739']
answer:
b9515815QBe4753601347696901335cA68334391319347


question:
7, 8, ['z', '4705', '131', '3529', '9459', 'R', 'Z', '4137']
answer:
4137Z


question:
9, 16, ['y', '9639', 'R', 'j', 's', 'K', '5343', 'g', '7347', '7525', '5759', 'O', '9649', '4209', 'b', 'q', 'C', 'l', 'w']
answer:

qb42099649O575975257347