ddd ddf ddi ddk ddo ddp ddr dds dfd dff dfi dfk dfo dfp dfr dfs di- did dif dii dik dio dip dir dis dki dkk dko dkp dkr dks dod dof doi dok doo dop dor dos dpd dpf dpi dpk dpo dpp dpr dps drd dri drk dro drp drr drs dsd dsf dsi dsk dso dsp dsr dss fdd fdf fdi fdk fdo fdp fdr fds ffd fff ffi ffk ffo ffp ffr ffs fid fif fii fik fip fir fis fkf fki fkk fkp fof foi fok foo fop for fos fpd fpi fpk fpo fpp fpr fps frd frf fri frk fro frp frr frs fsd fsf fsi fsk fso fsp fsr fss i-d i-f idd idf idi idk ido idp idr ids ifd iff ifi ifo ifp ifr ifs iid iif iii iio iip iir iis ikf iki ikk iko ikr iks io- iod iof ioi ioo iop ior ios ipd ipf ipi ipo ipp ipr ips ir- ird irf iri irk iro irp irr irs is- isd isf isi isk iso isp isr iss kdf kdk kdo kdp kdr kds kfd kff kfi kfo kfs kid kif kii kik kio kip kir kis kki kkk kkp kkr kks kod kof koi kok koo kop kor kos kpd kpf kpi kpk kpo kpp kpr kps krd krf kri krk kro krp krr krs ksd ksf ksi ksk kso ksp ksr kss o-i odd odf odi odo odp odr ods of- ofd off ofi ofo ofp ofr ofs oid oif oii oik oio oip oir ois okd oki okk oko okp okr oks oo- ood oof ooi ook ooo oop oor oos op- opd opf opi opk opo opp opr ops or- ord orf ori ork oro orp orr ors os- osd osf osi osk oso osp osr oss p-p pdd pdf pdi pdk pdo pdp pdr pds pfd pff pfi pfk pfo pfp pfr pfs pid pif pii pik pio pip pir pis pkd pkf pki pko pkp pkr pks pod pof poi pok poo pop por pos ppd ppf ppi ppk ppo ppp ppr pps prd prf pri prk pro prp prr prs ps- psd psf psi psk pso psp psr pss rdd rdf rdi rdo rdp rdr rds rfd rff rfi rfk rfo rfp rfr rfs rid rif rii rik rio rip rir ris rkf rkk rko rkp rks rod rof roi rok roo rop ror ros rpd rpf rpi rpk rpo rpp rpr rps rrd rrf rri rrk rrp rrr rrs rsd rsf rsi rsk rso rsp rsr rss sdd sdf sdi sdk sdo sdp sdr sds sfd sff sfi sfk sfo sfp sfr sfs sid sif sii sik sio sip sir sis sk- skd skf ski skk sko skp skr sks sod sof soi sok soo sop sor sos spd spf spi spk spo spp spr sps sr- srd srf sri srk sro srp srr srs ss- ssd ssf ssi ssk sso ssp ssr sss