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, 4, ['I', 'i', 'b', '2703']

Answer: 3072


Question: 2, 3, ['6875', 'D', 'r']

Answer: rD


Question: 1, 3, ['x', 'U', 'v', '1557', '6291', '6075', 'N', 'P', 'J', '2605', 'F', 'H', 'p', '1929', '2767', 'i', '5457']

Answer:
vUx