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: 5, 7, ['2725', '1489', 'P', '2021', 'c', '1605', 'R', 'T', 'p', 'q', '6487', '3395', 'u', 'x']

Answer: R5061c


Question: 10, 13, ['D', 'A', '4221', '7301', '1937', 'r', '5105', 'q', 'F', 'j', '9441', '6391', '7081', 'l', '6569', 'i', '8871', '5985']

Answer: 180719361449j


Question: 7, 19, ['225', 'e', 'H', 'q', '357', 'Z', '6207', '2485', '5107', 'z', '7873', 'h', 'B', '5891', '9317', '7553', 'v', 'l', 'U', 'S', 'v', '6959', 'o', 'J']

Answer:
Ulv355771391985Bh3787z701558427026