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: 2, 4, ['o', '5393', 'p', 'h', '5617', 'F', 'I', 'a']

Answer: hp3935


Question: 2, 5, ['f', 'd', '2691', 't', 'u']

Answer: ut1962d


Question: 3, 4, ['H', 'h', '7029', '5051']

Answer:
15059207