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:
8, 9, ['W', '1701', 'c', '3565', 'W', '687', 'b', 'o', 's', '3041', '4325', 'A', '2405', '5087', 'y', 'x', '2017', 'Y', 'U']
answer:
so


question:
1, 15, ['5341', 's', 'V', 'F', '4539', '5719', '5319', '2513', 'P', 'j', 'G', '5547', 'J', '8859', 'v', '6751', '3185', '8829', 'x', '3789']
answer:
v8859J5547GjP2513531957194539FVs5341


question:
20, 21, ['D', 'Z', 'z', '5407', '5653', 'l', 'g', '9989', '3933', '3545', '1849', 'x', 'D', '4951', 'R', 'o', '3285', 'v', '6019', 'I', '7717', '8899', '9781', '2493', 'u']
answer:

7717I