ddd ddf ddn ddo ddp ddr dds dfd dff dfn dfo dfp dfr dfs dnd dnf dnn dno dnp dnr dns dod dof don doo dop dor dos dpd dpf dpn dpo dpp dpr dps drd drn dro drp drr drs dsd dsf dsn dso dsp dsr dss fdd fdf fdn fdo fdp fdr fds ffd fff ffn ffo ffp ffr ffs fnd fnf fnn fnp fnr fns fof fon foo fop for fos fpd fpn fpo fpp fpr fps frd frf frn fro frp frr frs fsd fsf fsn fso fsp fsr fss ndd ndf ndn ndo ndp ndr nds nfd nff nfn nfo nfp nfr nfs nnf nnn nno nnp nns no- nod nof non noo nop nor nos npd npf npn npo npp npr nps nrd nrf nrn nro nrp nrr nrs nsd nsf nsn nso nsp nsr nss odd odf odn odo odp odr ods of- ofd off ofn ofo ofp ofr ofs on- ond onf onn ono onp onr ons oo- ood oof oon ooo oop oor oos op- opd opf opn opo opp opr ops or- ord orf orn oro orp orr ors os- osd osf osn oso osp osr oss p-p pdd pdf pdn pdo pdp pdr pds pfd pff pfn pfo pfp pfr pfs pn- pnd pnf pnn pno pnp pnr pns pod pof pon poo pop por pos ppd ppf ppn ppo ppp ppr pps prd prf prn pro prp prr prs ps- psd psf psn pso psp psr pss rdd rdf rdn rdo rdp rdr rds rfd rff rfn rfo rfp rfr rfs rnd rnn rno rnp rnr rns rod rof ron roo rop ror ros rpd rpf rpn rpo rpp rpr rps rrd rrf rrn rrp rrr rrs rsd rsf rsn rso rsp rsr rss sdd sdf sdn sdo sdp sdr sds sfd sff sfn sfo sfp sfr sfs snd snf snn sno snp snr sns sod sof son soo sop sor sos spd spf spn spo spp spr sps sr- srd srf srn sro srp srr srs ss- ssd ssf ssn sso ssp ssr sss