a-a aaa aaf aah aan aao aar aas af- afa aff afh afn afo afr afs aha ahf ahh ahn aho ahr ahs an- ana anf anh ann ano anr ans aoa aof aoh aon aoo aor aos ar- ara arf arh arn aro arr ars as- asa asf ash asn aso asr ass faa faf fah fan fao far fas ffa fff ffh ffn ffo ffr ffs fha fhf fhh fhn fho fhr fhs fna fnf fnh fnn fnr fns foa fof foh fon foo for fos fra frf frh frn fro frr frs fsa fsf fsh fsn fso fsr fss haa haf hah han hao har has hfa hff hfh hfn hfo hfr hfs hha hhf hhh hhn hho hhr hhs hna hnf hnh hnn hno hns hoa hof hoh hon hoo hor hos hr- hra hrf hrh hrn hro hrr hrs hsa hsf hsh hsn hsr hss naa naf nah nan nao nar nas nfa nff nfn nfo nfr nfs nha nhf nhh nhn nhr nhs nna nnf nnh nnn nno nns no- noa nof noh non noo nor nos nra nrf nrn nro nrr nrs nsa nsf nsh nsn nso nsr nss oaa oaf oah oan oao oar oas of- ofa off ofn ofo ofr ofs oha ohf ohh ohn oho ohr ohs on- ona onf onh onn ono onr ons oo- ooa oof ooh oon ooo oor oos or- ora orf orh orn oro orr ors os- osa osf osh osn oso osr oss ra- raa raf rah ran rao rar ras rfa rff rfh rfn rfo rfr rfs rh- rha rhf rhh rhn rho rhr rhs rna rnh rnn rno rnr rns roa rof roh ron roo ror ros rra rrf rrh rrn rrr rrs rsa rsf rsh rsn rso rsr rss saa saf sah san sao sar sas sfa sff sfh sfn sfo sfr sfs sh- sha shf shh shn sho shr shs sna snf snn sno snr sns soa sof soh son soo sor sos sr- sra srf srh srn sro srr srs ss- ssa ssf ssh ssn sso ssr sss