C212212121212113313132333131311331323331323132233132322331312323221   >>    C21221212121211331313233313131133132333132313223313232233131232322   <<    C212212121212113313132333131311331323331323132233132322331312323223   >>      C212212121212113313132333131311331323331323132233132322331312323222   >>