C2122121212121133132213231313231313231323223313231322331323331323133312312121   >>    C212212121212113313221323131323131323132322331323132233132333132313331231212   <<    C2122121212121133132213231313231313231323223313231322331323331323133312312123   >>      C2122121212121133132213231313231313231323223313231322331323331323133312312122   >>