C212212121212113313132333131311331323331323132233132311331323233232211   >>    C21221212121211331313233313131133132333132313223313231133132323323221   <<    C212212121212113313132333131311331323331323132233132311331323233232213   >>      C212212121212113313132333131311331323331323132233132311331323233232212   >>