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, 6, ['95', '1973', 'L', '8811', '2655', '2661', 'v', 'a', '1115', '7687', '8807', 'r']

Answer: 166255621188L


Question: 2, 3, ['U', 'U', '5201', '4581', '2943', 'B', 'j']

Answer: 1025U


Question: 8, 8, ['9153', 'O', 'Q', '1699', '8345', '4169', '7033', '3199', 'S', '6343', '5907', 'p']

Answer:
9913