C212212121212113313132333131311331323331323132233132313231322123311   >>    C21221212121211331313233313131133132333132313223313231323132212331   <<    C212212121212113313132333131311331323331323132233132313231322123313   >>      C212212121212113313132333131311331323331323132233132313231322123312   >>