C212212121212113313132333131311331323331323132233132311331323221311321   >>    C21221212121211331313233313131133132333132313223313231133132322131132   <<    C212212121212113313132333131311331323331323132233132311331323221311323   >>      C212212121212113313132333131311331323331323132233132311331323221311322   >>