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: 4, 12, ['S', '1783', 'd', '3489', '2291', '4757', 'b', '5761', 'Y', 'M', '6453', '2477', 'B', 'm', '6749', 'S', '3291', 'L', '8725', '8637', 'l', '1747']

Answer: 77423546MY1675b757419229843


Question: 14, 17, ['J', '8303', 'I', 'O', 'Y', 'U', '9225', '5315', '8891', '5195', '5805', '8577', 'n', '3621', 'k', '4049', 'k', 'y', '9591', '3465', '9829']

Answer: k9404k1263


Question: 9, 15, ['4481', '6939', 'L', '6885', 'a', 'a', 'z', 'I', 'Y', '437', 'C', '9917', 'e', '3495', '9081', 'v', 'p', 'k', '7611', 'C', 'S', '2139', '7911']

Answer:
18095943e7199C734Y