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:
4, 12, ['4811', '5765', '695', '8003', '9709', 'Q', '3265', '1983', '8313', 'P', '7717', 'V', '5061', 't', '7263', 'z', 'a', '3807', '9269', '2399', '8537', 'O', 'd', 'j']
answer:
V7717P831319833265Q97098003


question:
12, 20, ['T', '9007', '6857', '2299', 'y', '6547', 'n', '2735', '8025', 'O', '5979', '6863', 'R', 'O', '5955', '9393', 'S', '3235', 'V', '5991', 'C']
answer:

5991V3235S93935955OR6863