a-a a-b a-i a-t aaa aab aaf aai aak aan aar aas aat ab- aba abb abf abi abk abn abr abs abt af- afa afb aff afi afk afn afr afs aft ai- aia aib aif aii aik ain air ais ait aka akb aki akk akn akr aks an- ana anb anf ani ank ann anr ans ant ar- ara arb arf ari ark arn arr ars art as- asa asb asf asi ask asn asr ass ast at- ata atb atf ati atn atr ats att baa bab baf bai bak ban bar bas bat bba bbb bbf bbi bbk bbn bbr bbs bbt bfa bfb bff bfi bfn bfr bfs bft bi- bia bib bif bii bik bin bir bis bit bka bkb bkf bkk bkn bkr bks bkt bna bnb bnf bni bnk bnn bnr bns bnt bra brb brf bri brk brn brr brs brt bsa bsb bsf bsi bsk bsn bsr bss bst bta btb btf bti btk btn btr bts btt faa fab faf fai fak fan far fas fat fba fbb fbf fbi fbk fbn fbr fbs fbt ffa fff ffi ffk ffn ffr ffs fft fia fib fif fii fik fin fir fis fit fka fkb fkf fki fkk fkt fna fnb fnf fni fnk fnn fnr fns fnt fra frb frf fri frk frn frr frs frt fsa fsb fsf fsi fsk fsn fsr fss fst fta ftb ftf fti ftk ftn ftr fts ftt i-f ia- iaa iab iaf iai ian iar ias iat iba ibb ibf ibi ibk ibn ibr ibs ibt ifa ifb iff ifi ifn ifr ifs ift iia iib iif iii iin iir iis iit ika ikb ikf iki ikk ikr iks ikt in- ina inb inf ini ink inn inr ins int ir- ira irb irf iri irk irn irr irs irt is- isa isb isf isi isk isn isr iss ist ita itb itf iti itk itn its itt k-t ka- kaa kab kaf kai kak kan kar kas kat kba kbb kbf kbi kbk kbn kbr kbs kfa kff kfi kfs kia kib kif kii kik kin kir kis kit kkb kki kkk kkn kkr kks kkt kn- kna knf kni knk knn knr knt kra krf kri krk krn krr krs krt ksa ksb ksf ksi ksk ksn ksr kss kst kta ktb ktf ktk ktn ktr kts ktt n-i naa nab naf nai nak nan nar nas nat nba nbb nbf nbi nbk nbn nbr nbs nbt nfa nfb nff nfi nfk nfn nfr nfs nft nia nib nif nii nik nin nir nis nit nka nkf nki nkk nkn nkr nks nkt nna nnb nnf nni nnk nnn nns nnt nra nrb nrf nri nrk nrn nrr nrs nrt nsa nsb nsf nsi nsk nsn nsr nss nst nta ntb ntf nti ntk ntn ntr nts ntt ra- raa rab raf rai rak ran rar ras rat rba rbb rbf rbi rbk rbn rbr rbs rbt rfa rfb rff rfi rfk rfn rfr rfs rft ria rib rif rii rik rin rir ris rit rkb rkf rkk rks rkt rna rnb rni rnn rnr rns rnt rra rrb rrf rri rrk rrn rrr rrs rrt rsa rsb rsf rsi rsk rsn rsr rss rst rta rtb rtf rti rtk rtn rtr rts rtt saa sab saf sai sak san sar sas sat sba sbb sbf sbi sbk sbn sbr sbs sbt sfa sfb sff sfi sfk sfn sfr sfs sft sia sib sif sii sik sin sir sis sit sk- ska skb skf ski skk skr sks skt sna snb snf sni snk snn snr sns snt sr- sra srb srf sri srk srn srr srs srt ss- ssa ssb ssf ssi ssk ssn ssr sss sst sta stb stf sti stk stn str sts stt taa tab taf tai tak tan tar tas tat tba tbb tbf tbi tbk tbn tbr tbs tbt tfa tfb tff tfi tfk tfn tfr tfs tft tia tib tif tii tik tin tir tis tit tka tkb tkk tkr tks tkt tna tnb tnf tni tnk tnn tnr tns tnt tra trb trf tri trk trn trr trs trt tsa tsb tsf tsi tsk tsn tsr tss tst tta ttb ttf tti ttk ttn ttr tts ttt