D3312121211331313331313232233132322331323132233132313233313221231   >>    D331212121133131333131323223313232233132313223313231323331322123   <<    D3312121211331313331313232233132322331323132233132313233313221233   >>      D3312121211331313331313232233132322331323132233132313233313221232   >>