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, ['6935', '8323', '6167', 'I', 'G', 'f', '303', '3387', '3257', '3069', 'q', 'r', '187', 'k', '6031', '8221', '721']

Answer: 960375237833303fGI


Question: 1, 3, ['6017', 'o', '1817', 'W']

Answer: 7181o7106


Question: 20, 29, ['3723', '9753', 'x', '3519', 'i', 'j', 'H', '5443', 'i', 'v', '7943', '1503', '353', 'o', '5101', '7959', '2523', '4383', '1351', '9575', 'm', 'v', 'x', 't', '319', 'p', '2603', 'A', '2771', '5619']

Answer:
1772A3062p913txvm5759