C212212121212113313132333131311331323331323132233132322132322331111   >>    C21221212121211331313233313131133132333132313223313232213232233111   <<    C212212121212113313132333131311331323331323132233132322132322331113   >>      C212212121212113313132333131311331323331323132233132322132322331112   >>