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:
4, 7, ['H', 'I', 'B', '6833', 'a', '7477', '8817', 'd', '4545', '779', 'F', '3265', '1819', '9317', '879']
answer:
88177477a6833


question:
13, 22, ['9291', 'W', '7055', 't', 'i', 'b', 'U', '4739', '5753', '3843', 'H', '1809', '3663', 'Q', '9687', 'P', 'v', 'b', 'J', 't', 'z', 'R']
answer:
RztJbvP9687Q3663


question:
17, 21, ['S', '3913', '2559', '5721', 'J', 'z', 'I', '6355', '6735', '6503', '6241', 'q', 'p', 'o', 'q', 'b', 'x', '61', 'z', 'b', '7849']
answer:

7849bz61x