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: 2, 17, ['781', '1949', '8017', 'I', 'F', 'k', 's', 'f', '9531', '3769', '8135', 'R', '7643', 'v', '6217', '4085', 'M', '1993']

Answer: M58047126v3467R531896731359fskFI71089491


Question: 4, 9, ['g', '6285', 'B', 'l', '5153', 'n', '9751', 'X', 'w', '2291', 'S']

Answer: wX1579n3515l


Question: 2, 11, ['s', '6147', 'j', '5157', '1851', 'g', 'o', '2625', 'k', '2865', 'a', '533', 'c', 'K', 'm', '9881', 's', 'U', '7607', '3549', '8055']

Answer:
a5682k5262og15817515j7416