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: 5, 7, ['Y', '5101', 'B', '5129', 'a', 'y', 'v', '4577', '5455', '6685', '6435']

Answer: vya


Question: 2, 3, ['X', '8243', '1209']

Answer: 90213428


Question: 4, 4, ['z', '6563', '9739', 'q', 'B', 'Q', 's', 'V', '5817', 'n', '1029', '1435', 'V', '6071', 'f', 'y', 'j', 'E', '5157', 'K', '6127', '3361', 'F', 'j']

Answer:
q