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: 6, 14, ['505', 's', '3619', 's', '2871', '6403', 'b', 'M', 'Q', '9645', '9425', 'V', '873', 'l', '2917', 'Q', '9465', 'z', '1513', 'S', 'e', '9733', '7669', 'B']

Answer: l378V52495469QMb3046


Question: 1, 1, ['4571', '3997']

Answer: 1754


Question: 2, 17, ['Q', '5703', 'I', '7211', '7331', '7993', '9241', '2673', '5667', 'b', '8639', 'q', '8143', '7101', 'c', '6139', '4497', 'b', 'L', '237', '2193', '4469', 'o']

Answer:
79449316c10173418q9368b766537621429399713371127I3075