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: 4, 10, ['L', '6587', 'q', '9569', '6203', '443', '2975', '4641', '9195', '5775', 'y', 'K', '9665']

Answer: 577559191464579234430269659


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: 13, 21, ['5137', 'e', '8603', '6109', 'A', 'N', 'b', '8509', '9645', '6535', 'c', '8459', '8471', '1983', '5559', '5201', 'q', 'I', '3859', 'w', '4481', '6677', 'y', '977']

Answer:
1844w9583Iq1025955538911748