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

Answer: YF


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: 17, 19, ['v', '7713', '6199', 'n', 'n', 'q', '1673', 'g', 'M', 'b', 'E', '4547', 'o', 'z', 'q', '691', 'h', '2879', 'q', 'w', 'p']

Answer:
q9782h