C212212121212113313132333131311331323331323132233132333132331111   >>    C21221212121211331313233313131133132333132313223313233313233111   <<    C212212121212113313132333131311331323331323132233132333132331113   >>      C212212121212113313132333131311331323331323132233132333132331112   >>