D331212121133131333131323223313232233132313223313231323211232221   >>    D33121212113313133313132322331323223313231322331323132321123222   <<    D331212121133131333131323223313232233132313223313231323211232223   >>      D331212121133131333131323223313232233132313223313231323211232222   >>