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: 21, 28, ['8641', 'o', '1301', '8225', '8079', 'Y', 'O', '9571', 'n', 'Q', 'n', 'W', '6555', 'm', 'A', 'A', '4459', '5983', '5469', 'd', '6269', 'E', '2107', 'X', '8397', 'f', 'D', '9129']

Answer: 9219Df7938X7012E9626


Question: 1, 7, ['P', 'h', '1443', 'b', 'K', '2641', '3831']

Answer: 13831462Kb3441hP


Question: 16, 20, ['T', 'L', 'H', 'Q', '2145', 'Z', '8669', '4213', 'F', 'v', 'Y', 'X', 'K', '3301', '4297', '2135', '2829', '5561', 'W', 's', 'v', 'X', 'q', '4361', '3943', 'S']

Answer:
sW165592825312