C2122121212121133132213231313231313231323223313231322331313233313231323132121   >>    C212212121212113313221323131323131323132322331323132233131323331323132313212   <<    C2122121212121133132213231313231313231323223313231322331313233313231323132123   >>      C2122121212121133132213231313231313231323223313231322331313233313231323132122   >>