instruction:
In this task, you are given inputs 'i', 'j', and A, where 'i' and 'j' are integers and A is a list. A list is shown by two brackets and comma-separated numbers and characters inside, like ['1', '12', 'l']. You need to concatenate all elements of A from the ith element to the jth element, and then reverse the resulting 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 reverse first and then concatenate.
question:
2, 2, ['G', 'S']
answer:
S


question:
8, 9, ['2123', 'O', '2505', 'd', '5435', '2145', '8281', 'b', 'v', '6485', '2349', '8739', '8459', 'O', 'h', '8279', 'L', '8345', 't', 'T', '5075', '7295', 'X']
answer:
vb


question:
22, 24, ['s', '4443', '9625', '5149', '9895', 'Z', '9427', '8821', '5501', 'r', 'X', 'd', 'U', 'V', '1979', 'F', 'u', 'J', 'X', '2631', '1061', '251', '1745', '7181', 'w']
answer:

18175471152


