D331212121133132233131323223313233313231313331311331323221211231   >>    D33121212113313223313132322331323331323131333131133132322121123   <<    D331212121133132233131323223313233313231313331311331323221211233   >>      D331212121133132233131323223313233313231313331311331323221211232   >>