a-a aaa aaf aam aan aao aar aas af- afa aff afm afn afo afr afs ama amf amm amn amo amr ams an- ana anf anm ann ano anr ans aoa aof aom aon aoo aor aos ar- ara arf arm arn aro arr ars as- asa asf asm asn aso asr ass faa faf fam fan fao far fas ffa fff ffm ffn ffo ffr ffs fma fmf fmm fmn fmo fmr fms fna fnf fnm fnn fnr fns foa fof fom fon foo for fos fra frf frm frn fro frr frs fsa fsf fsm fsn fso fsr fss m-f m-o m-r maa maf mam man mao mar mas mfa mff mfm mfn mfo mfr mfs mma mmf mmm mmn mmo mmr mms mna mnf mnm mnn mno mnr mns moa mof mom mon moo mor mos mra mrf mrm mrn mro mrr mrs msa msf msm msn mso msr mss naa naf nam nan nao nar nas nfa nff nfn nfo nfr nfs nma nmm nmn nmo nmr nms nna nnf nnm nnn nno nns no- noa nof nom non noo nor nos nra nrf nrm nrn nro nrr nrs nsa nsf nsm nsn nso nsr nss oaa oaf oam oan oao oar oas of- ofa off ofm ofn ofo ofr ofs om- oma omf omm omn omo omr oms on- ona onf onn ono onr ons oo- ooa oof oom oon ooo oor oos or- ora orf orm orn oro orr ors os- osa osf osm osn oso osr oss ra- raa raf ram ran rao rar ras rfa rff rfm rfn rfo rfr rfs rma rmf rmm rmn rmo rmr rms rna rnm rnn rno rnr rns roa rof rom ron roo ror ros rra rrf rrm rrn rrr rrs rsa rsf rsm rsn rso rsr rss saa saf sam san sao sar sas sfa sff sfm sfn sfo sfr sfs sma smf smm smn smo smr sms sna snf snm snn sno snr sns soa sof som son soo sor sos sr- sra srf srm srn sro srr srs ss- ssa ssf ssm ssn sso ssr sss