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: 7, 8, ['1601', 'M', '4289', 'n', 'r', '8973', 'F', 'Y', 'v', '3357']

Answer: YF


Question: 1, 9, ['f', 'f', '4381', 'c', '3523', 'u', 'E', 'y', '7713', 'f', 'Q', '7631', '9529', 'M', '6041', '8011', '8441', 'i', 'c', 'V', 'b', 'x', 'h', 't', 'l', '5041', 'v', '6685', 'c']

Answer: 3177yEu3253c1834ff


Question: 2, 27, ['m', '1053', 'U', '4911', '7817', 'N', 'E', 's', '5153', 'N', 'a', 'V', '1263', '1939', 'k', '6471', 'S', 'r', 'w', 'q', 'o', '1389', '8861', '2429', 'c', '121', 'G', '5341', '4217']

Answer:
G121c924216889831oqwrS1746k93913621VaN3515sEN71871194U3501