a-a a-b a-i aaa aab aai aak aam aan aar aas ab- aba abb abi abk abm abn abr abs ai- aia aib aii aik aim ain air ais aka akb aki akk akm akn akr aks ama amb ami amk amm amn amr ams an- ana anb ani ank anm ann anr ans ar- ara arb ari ark arm arn arr ars as- asa asb asi ask asm asn asr ass baa bab bai bak bam ban bar bas bba bbb bbi bbk bbm bbn bbr bbs bi- bia bib bii bik bim bin bir bis bka bkb bkk bkm bkn bkr bks bma bmb bmi bmk bmm bmn bmr bms bna bnb bni bnk bnn bnr bns bra brb bri brk brm brn brr brs bsa bsb bsi bsk bsm bsn bsr bss ia- iaa iab iai iam ian iar ias iba ibb ibi ibk ibm ibn ibr ibs iia iib iii iim iin iir iis ika ikb iki ikk ikr iks im- ima imb imi imm imn ims in- ina inb ini ink inm inn inr ins ir- ira irb iri irk irm irn irr irs is- isa isb isi isk ism isn isr iss ka- kaa kab kai kak kam kan kar kas kba kbb kbi kbk kbm kbn kbr kbs kia kib kii kik kim kin kir kis kkb kki kkk kkm kkn kkr kks kma kmb kmi kmk kmm kms kn- kna kni knk knm knn knr kra kri krk krn krr krs ksa ksb ksi ksk ksm ksn ksr kss m-r maa mab mai mak mam man mar mas mba mbb mbi mbk mbm mbr mbs mi- mia mib mii mik mim min mir mis mka mkb mkk mkm mkn mkr mks mma mmb mmi mmk mmm mmn mmr mms mna mnb mni mnk mnm mnn mnr mns mra mrb mri mrk mrm mrn mrr mrs msa msb msi msk msm msn msr mss n-i naa nab nai nak nam nan nar nas nba nbb nbi nbk nbm nbn nbr nbs nia nib nii nik nim nin nir nis nka nki nkk nkm nkn nkr nks nma nmb nmi nmk nmm nmn nmr nms nna nnb nni nnk nnm nnn nns nra nrb nri nrk nrm nrn nrr nrs nsa nsb nsi nsk nsm nsn nsr nss ra- raa rab rai rak ram ran rar ras rba rbb rbi rbk rbm rbn rbr rbs ria rib rii rik rim rin rir ris rkb rkk rkm rks rma rmb rmi rmm rmn rmr rms rna rnb rni rnm rnn rnr rns rra rrb rri rrk rrm rrn rrr rrs rsa rsb rsi rsk rsm rsn rsr rss saa sab sai sak sam san sar sas sba sbb sbi sbk sbm sbn sbr sbs sia sib sii sik sim sin sir sis sk- ska skb ski skk skm skr sks sma smb smi smk smm smn smr sms sna snb sni snk snm snn snr sns sr- sra srb sri srk srm srn srr srs ss- ssa ssb ssi ssk ssm ssn ssr sss