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: 3, 6, ['z', 'b', '2697', 'W', '1449', 'x', '5327']

Answer: x9441W7962


Question: 3, 4, ['435', 'K', '8051', '7159']

Answer: 95171508


Question: 7, 9, ['4675', '7341', '8511', '7957', '3099', 'X', '4851', '9069', '2171']

Answer:
171296091584