C212212121212113313132333131311331323331323132233132313232311311   >>    C21221212121211331313233313131133132333132313223313231323231131   <<    C212212121212113313132333131311331323331323132233132313232311313   >>      C212212121212113313132333131311331323331323132233132313232311312   >>