-ic a-a a-c a-i aaa aac aaf aai aak aao aap aar aas ac- aca acc acf aci ack aco acp acr acs af- afa afc aff afi afk afo afp afr afs ai- aia aic aif aii aik aio aip air ais aka akc aki akk ako akp akr aks aoa aoc aof aoi aok aoo aop aor aos ap- apa apc apf api apk apo app apr aps ar- ara arc arf ari ark aro arp arr ars as- asa asc asf asi ask aso asp asr ass c-- caa cac caf cai cak cao cap car cas cca ccc ccf cci cck cco ccp ccr ccs cfa cfc cff cfi cfk cfo cfp cfr cfs ci- cia cic cif cii cik cio cip cir cis cka ckc cki cko cks co- coa coc cof coi cok coo cop cor cos cpa cpc cpf cpi cpk cpo cpp cpr cps cra crc crf cri crk cro crp crr crs csa csc csf csi csk cso csp csr css faa fac faf fai fak fao fap far fas fca fcc fcf fci fck fco fcp fcr fcs ffa ffc fff ffi ffk ffo ffp ffr ffs fia fic fif fii fik fip fir fis fka fkc fkf fki fkk fkp foa foc fof foi fok foo fop for fos fpa fpc fpi fpk fpo fpp fpr fps fra frc frf fri frk fro frp frr frs fsa fsc fsf fsi fsk fso fsp fsr fss i-f ia- iaa iac iaf iai iao iap iar ias ica icc icf ici ick ico icp icr ics ifa ifc iff ifi ifo ifp ifr ifs iia iic iif iii iio iip iir iis ika ikc ikf iki ikk iko ikr iks io- ioa ioc iof ioi ioo iop ior ios ipa ipc ipf ipi ipo ipp ipr ips ir- ira irc irf iri irk iro irp irr irs is- isa isc isf isi isk iso isp isr iss ka- kaa kac kaf kai kak kao kap kar kas kca kcc kci kck kcp kcr kcs kfa kfc kff kfi kfo kfs kia kic kif kii kik kio kip kir kis kkc kki kkk kkp kkr kks koa koc kof koi kok koo kop kor kos kpa kpc kpf kpi kpk kpo kpp kpr kps kra krc krf kri krk kro krp krr krs ksa ksc ksf ksi ksk kso ksp ksr kss o-i oaa oac oaf oai oak oao oap oar oas oc- oca occ ocf oci ock oco ocp ocr ocs of- ofa ofc off ofi ofo ofp ofr ofs oia oic oif oii oik oio oip oir ois oka okc oki okk oko okp okr oks oo- ooa ooc oof ooi ook ooo oop oor oos op- opa opc opf opi opk opo opp opr ops or- ora orc orf ori ork oro orp orr ors os- osa osc osf osi osk oso osp osr oss p-p paa pac paf pai pak pao pap par pas pca pcc pcf pci pck pco pcp pcr pcs pfa pfc pff pfi pfk pfo pfp pfr pfs pia pic pif pii pik pio pip pir pis pka pkc pkf pki pko pkp pkr pks poa poc pof poi pok poo pop por pos ppa ppc ppf ppi ppk ppo ppp ppr pps pra prc prf pri prk pro prp prr prs ps- psa psc psf psi psk pso psp psr pss ra- raa rac raf rai rak rao rap rar ras rca rcc rcf rci rco rcp rcr rcs rfa rfc rff rfi rfk rfo rfp rfr rfs ria ric rif rii rik rio rip rir ris rkc rkf rkk rko rkp rks roa roc rof roi rok roo rop ror ros rpa rpc rpf rpi rpk rpo rpp rpr rps rra rrc rrf rri rrk rrp rrr rrs rsa rsc rsf rsi rsk rso rsp rsr rss saa sac saf sai sak sao sap sar sas sca scc scf sci sck sco scp scr scs sfa sfc sff sfi sfk sfo sfp sfr sfs sia sic sif sii sik sio sip sir sis sk- ska skc skf ski skk sko skp skr sks soa soc sof soi sok soo sop sor sos spa spc spf spi spk spo spp spr sps sr- sra src srf sri srk sro srp srr srs ss- ssa ssc ssf ssi ssk sso ssp ssr sss