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: 3, 20, ['x', 'S', 's', 'a', '5077', 'D', '3979', 'I', '3129', 'R', '8517', 'r', 'l', 'K', 'N', '9701', '227', 'n', '9385', 'U']

Answer: U5839n7221079NKlr7158R9213I9793D7705as


Question: 4, 16, ['9593', '3873', 'f', 'l', 'Z', '6157', 'n', 'l', '827', '9127', '143', 'J', '2223', 'A', 'o', '4733', 'C', 'U', 'V', '2613', 'r', 't', 'Q', 'l', 'H', '5189', 'J', 'I']

Answer: 3374oA3222J3417219728ln7516Zl


Question: 1, 17, ['4411', '7071', '999', '1033', '4889', 'i', '8785', '8307', '9471', '6671', 'f', 'e', 'Q', '6005', 'G', 'K', 'K', 'w', 'D', '3977']

Answer:
KKG5006Qef1766174970385878i9884330199917071144