C2122121212121133132213231313231323131323223313231322331331123123311   >>    C212212121212113313221323131323132313132322331323132233133112312331   <<    C2122121212121133132213231313231323131323223313231322331331123123313   >>      C2122121212121133132213231313231323131323223313231322331331123123312   >>