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: 10, 13, ['K', '6565', 'A', '5073', '1249', '2817', '3663', '3799', 'G', '2707', '3405', '5999', '5577', 'c', 'p', 'V', '8373', 'e', 'W', '5977', 's', 'p', 'E', '5425']

Answer: 7755999550437072


Question: 3, 4, ['2419', '643', '8177', '7291', '561', '6529', '4101', 'u', '6445']

Answer: 19277718


Question: 3, 4, ['207', '3145', 'j', '9903', '2693', '2851', '3811', 'E', '2515', 'W', 'q', '2747', '1601', '1045', 'C']

Answer:
3099j