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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def reversal_circuit(qubits: Qubits) -> Circuit: """Returns a circuit to reverse qubits"""

    N = len(qubits)
    circ = Circuit()
    for n in range(N // 2):
        circ += SWAP(qubits[n], qubits[N-1-n])
    return circ