a-a a-i aaa aaf aai aam aan aao aar aas af- afa aff afi afm afn afo afr afs ai- aia aif aii aim ain aio air ais ama amf ami amm amn amo amr ams an- ana anf ani anm ann ano anr ans aoa aof aoi aom aon aoo aor aos ar- ara arf ari arm arn aro arr ars as- asa asf asi asm asn aso asr ass faa faf fai fam fan fao far fas ffa fff ffi ffm ffn ffo ffr ffs fia fif fii fim fin fir fis fma fmf fmi fmm fmn fmo fmr fms fna fnf fni fnm fnn fnr fns foa fof foi fom fon foo for fos fra frf fri frm frn fro frr frs fsa fsf fsi fsm fsn fso fsr fss i-f ia- iaa iaf iai iam ian iao iar ias ifa iff ifi ifm ifn ifo ifr ifs iia iif iii iim iin iio iir iis im- ima imf imi imm imn imo ims in- ina inf ini inm inn ino inr ins io- ioa iof ioi iom ion ioo ior ios ir- ira irf iri irm irn iro irr irs is- isa isf isi ism isn iso isr iss m-f m-o m-r maa maf mai mam man mao mar mas mfa mff mfi mfm mfn mfo mfr mfs mi- mia mif mii mim min mio mir mis mma mmf mmi mmm mmn mmo mmr mms mna mnf mni mnm mnn mno mnr mns moa mof moi mom mon moo mor mos mra mrf mri mrm mrn mro mrr mrs msa msf msi msm msn mso msr mss n-i naa naf nai nam nan nao nar nas nfa nff nfi nfn nfo nfr nfs nia nif nii nim nin nio nir nis nma nmi nmm nmn nmo nmr nms nna nnf nni nnm nnn nno nns no- noa nof noi nom non noo nor nos nra nrf nri nrm nrn nro nrr nrs nsa nsf nsi nsm nsn nso nsr nss o-i oaa oaf oai oam oan oao oar oas of- ofa off ofi ofm ofn ofo ofr ofs oia oif oii oim oin oio oir ois om- oma omf omi omm omn omo omr oms on- ona onf oni onn ono onr ons oo- ooa oof ooi oom oon ooo oor oos or- ora orf ori orm orn oro orr ors os- osa osf osi osm osn oso osr oss ra- raa raf rai ram ran rao rar ras rfa rff rfi rfm rfn rfo rfr rfs ria rif rii rim rin rio rir ris rma rmf rmi rmm rmn rmo rmr rms rna rni rnm rnn rno rnr rns roa rof roi rom ron roo ror ros rra rrf rri rrm rrn rrr rrs rsa rsf rsi rsm rsn rso rsr rss saa saf sai sam san sao sar sas sfa sff sfi sfm sfn sfo sfr sfs sia sif sii sim sin sio sir sis sma smf smi smm smn smo smr sms sna snf sni snm snn sno snr sns soa sof soi som son soo sor sos sr- sra srf sri srm srn sro srr srs ss- ssa ssf ssi ssm ssn sso ssr sss