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.
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Question: 1, 4, ['63', '5429', '5563', '2045', '875', '7163', '1869']

Answer: 54023655924536


Question: 6, 10, ['P', '6217', 'k', '761', 'L', 'r', '1897', '1503', '7353', '1055', '6661', 'p', 'p', '4313', 'i', 'P', '5081', '3723', 'x', '8455', 'D', 'l', '1379']

Answer: 5501353730517981r


Question: 8, 17, ['i', 'J', '9823', 'z', 'U', 'z', '5877', '7777', '6537', '9407', 'A', '745', 'V', 'b', '7755', '9379', '2621', 'f', '4917']

Answer:
126297395577bV547A704973567777