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:
18, 22, ['2445', 'L', 'x', 'i', '9929', '3105', 'v', '445', 'O', '353', 'j', '9877', 'D', 'U', '885', '9485', 'V', '8219', '2963', '685', '1659', 'U']
answer:
U165968529638219


question:
4, 9, ['7691', '4539', '3381', 'b', 'g', '9615', '8187', '177', '2473', '8579', '9739', 'C', 'v', 'q', '2879', 'Z', '6817', '5247', '5477', 'Y', 'w', '3981']
answer:
247317781879615gb


question:
5, 9, ['8139', '5595', '7729', '3975', 'w', 'Z', 'j', '479', '1177']
answer:

1177479jZw