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:
13, 20, ['8627', '7993', 'N', 'p', 'n', 'v', 'T', 'L', 'z', '2929', 'a', 'D', '8465', 'R', '8803', 'q', '1069', 'p', '7231', '9581', '1689', 'b', '8773', 'P', 'a', 'L', 't']
answer:
18591327p9601q3088R5648


question:
1, 3, ['o', 'o', '4511', '9203', '6071', 'Q', '5337']
answer:
1154oo


question:
5, 12, ['1963', '2649', 'L', '3343', 'F', 'B', 'D', 'N', 'i', '7279', '5147', 'd', '3033']
answer:

d74159727iNDBF