D3312121211331313331313232233132322331323132233132313232112313221   >>    D331212121133131333131323223313232233132313223313231323211231322   <<    D3312121211331313331313232233132322331323132233132313232112313223   >>      D3312121211331313331313232233132322331323132233132313232112313222   >>