ddd ddf ddi ddn ddo ddp dds dfd dff dfi dfn dfo dfp dfs di- did dif dii din dio dip dis dnd dnf dni dnn dno dnp dns dod dof doi don doo dop dos dpd dpf dpi dpn dpo dpp dps dsd dsf dsi dsn dso dsp dss fdd fdf fdi fdn fdo fdp fds ffd fff ffi ffn ffo ffp ffs fid fif fii fin fip fis fnd fnf fni fnn fnp fns fof foi fon foo fop fos fpd fpi fpn fpo fpp fps fsd fsf fsi fsn fso fsp fss i-d i-f idd idf idi idn ido idp ids ifd iff ifi ifn ifo ifp ifs iid iif iii iin iio iip iis in- ind inf ini inn ino inp ins io- iod iof ioi ion ioo iop ios ipd ipf ipi ipn ipo ipp ips is- isd isf isi isn iso isp iss n-i ndd ndf ndi ndn ndo ndp nds nfd nff nfi nfn nfo nfp nfs nid nif nii nin nio nip nis nnf nni nnn nno nnp nns no- nod nof noi non noo nop nos npd npf npi npn npo npp nps nsd nsf nsi nsn nso nsp nss o-i odd odf odi odn odo odp ods of- ofd off ofi ofn ofo ofp ofs oid oif oii oin oio oip ois on- ond onf oni onn ono onp ons oo- ood oof ooi oon ooo oop oos op- opd opf opi opn opo opp ops os- osd osf osi osn oso osp oss p-p pdd pdf pdi pdn pdo pdp pds pfd pff pfi pfn pfo pfp pfs pid pif pii pin pio pip pis pn- pnd pnf pni pnn pno pnp pns pod pof poi pon poo pop pos ppd ppf ppi ppn ppo ppp pps ps- psd psf psi psn pso psp pss sdd sdf sdi sdn sdo sdp sds sfd sff sfi sfn sfo sfp sfs sid sif sii sin sio sip sis snd snf sni snn sno snp sns sod sof soi son soo sop sos spd spf spi spn spo spp sps ss- ssd ssf ssi ssn sso ssp sss