a-a aaa aaf aan aao aar aas aau aax af- afa aff afn afo afr afs afu afx an- ana anf ann ano anr ans anu anx aoa aof aon aoo aor aos aou aox ar- ara arf arn aro arr ars aru arx as- asa asf asn aso asr ass asu asx au- aua auf aun auo aur aus aux ax- axa axn axo axr axs axx faa faf fan fao far fas fau fax ffa fff ffn ffo ffr ffs ffu ffx fna fnf fnn fnr fns fnu fnx foa fof fon foo for fos fou fox fra frf frn fro frr frs fru fsa fsf fsn fso fsr fss fsu fsx fua fuf fun fuo fur fus fuu fux fxr fxs fxu fxx naa naf nan nao nar nas nau nax nfa nff nfn nfo nfr nfs nfu nna nnf nnn nno nns nnu no- noa nof non noo nor nos nou nox nra nrf nrn nro nrr nrs nru nrx nsa nsf nsn nso nsr nss nsu nsx nua nun nuo nur nus nuu nux oaa oaf oan oao oar oas oau oax of- ofa off ofn ofo ofr ofs ofu ofx on- ona onf onn ono onr ons onu onx oo- ooa oof oon ooo oor oos oox or- ora orf orn oro orr ors oru orx os- osa osf osn oso osr oss osu osx ou- oua ouf oun ouo our ous ox- oxa oxf oxn oxo oxx ra- raa raf ran rao rar ras rau rax rfa rff rfn rfo rfr rfs rfu rna rnn rno rnr rns rnu roa rof ron roo ror ros rou rox rra rrf rrn rrr rrs rru rsa rsf rsn rso rsr rss rsu rsx rua ruf run ruo rur rus ruu rux rxr rxs saa saf san sao sar sas sau sax sfa sff sfn sfo sfr sfs sfu sfx sna snf snn sno snr sns snu soa sof son soo sor sos sou sox sr- sra srf srn sro srr srs srx ss- ssa ssf ssn sso ssr sss ssu ssx sua suf sun suo sur sus suu sux sxn sxs sxu ua- uaa uaf uan uao uar uas uau ufa uff ufn ufo ufr ufs ufu ufx un- una unf unn uno unr uns unu unx uoa uon uoo uor uos uox ur- ura urf urn uro urr urs uru urx usa usf usn uso usr uss usu usx uua uun uur uus uuu uxf uxo uxr uxu xaa xaf xan xar xas xau xfa xfn xfs xfx xna xno xns xnu xoa xof xon xoo xor xos xox xrf xrx xsa xss xun xus xxo xxx