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: 18, 20, ['1111', '8387', 'Q', 'O', 'A', 'E', '7233', 'o', '5603', 'H', '5793', 'k', '5603', 'B', 'F', 'e', 'Q', 'w', '9253', '6559']

Answer: 95563529w


Question: 1, 2, ['5111', 'U', '441', '8381']

Answer: U1115


Question: 4, 20, ['1155', '2799', '6165', '9855', '4787', 'n', '1245', '6225', '4037', 'g', 'C', 'v', 'D', 'C', 'X', 'j', 'n', '8719', 'v', 'c']

Answer:
cv9178njXCDvCg730452265421n78745589