-er a-a a-b a-i aaa aab aae aai aak aam aan aar aas ab- aba abb abe abi abk abm abn abr abs aea aeb aee aei aek aem aen aer aes ai- aia aib aie aii aik aim ain air ais aka akb ake aki akk akm akn akr aks ama amb ame ami amk amm amn amr ams an- ana anb ane ani ank anm ann anr ans ar- ara arb are ari ark arm arn arr ars as- asa asb ase asi ask asm asn asr ass baa bab bae bai bak bam ban bar bas bba bbb bbe bbi bbk bbm bbn bbr bbs be- bea beb bee bei bek bem ben ber bes bi- bia bib bie bii bik bim bin bir bis bka bkb bke bkk bkm bkn bkr bks bma bmb bme bmi bmk bmm bmn bmr bms bna bnb bne bni bnk bnn bnr bns bra brb bre bri brk brm brn brr brs bsa bsb bse bsi bsk bsm bsn bsr bss eaa eab eae eai eak eam ean ear eas eba ebb ebe ebi ebk ebm ebn ebr ebs eea eeb eee eek eem een eer ees eia eib eie eii eik eim ein eir eis eka ekb eke eki ekr eks em- ema emb eme emi emk emm emn emr ems en- ena enb ene eni enk enm enn enr ens era erb ere eri erk erm ern err ers es- esa esb ese esi esk esm esn esr ess ia- iaa iab iae iai iam ian iar ias iba ibb ibe ibi ibk ibm ibn ibr ibs ie- iea iee iei iek iem ien ier ies iia iib iie iii iim iin iir iis ika ikb ike iki ikk ikr iks im- ima imb ime imi imm imn ims in- ina inb ine ini ink inm inn inr ins ir- ira irb ire iri irk irm irn irr irs is- isa isb ise isi isk ism isn isr iss ka- kaa kab kae kai kak kam kan kar kas kba kbb kbe kbi kbk kbm kbn kbr kbs ke- kea keb kee kei kek kem ken ker kes kia kib kie kii kik kim kin kir kis kkb kke kki kkk kkm kkn kkr kks kma kmb kme kmi kmk kmm kms kn- kna kne kni knk knm knn knr kra kri krk krn krr krs ksa ksb kse ksi ksk ksm ksn ksr kss m-r maa mab mae mai mak mam man mar mas mba mbb mbe mbi mbk mbm mbr mbs mea meb mee mei mek mem men mer mes mi- mia mib mie mii mik mim min mir mis mka mkb mke mkk mkm mkn mkr mks mma mmb mme mmi mmk mmm mmn mmr mms mna mnb mne mni mnk mnm mnn mnr mns mra mrb mre mri mrk mrm mrn mrr mrs msa msb mse msi msk msm msn msr mss n-i naa nab nae nai nak nam nan nar nas nba nbb nbe nbi nbk nbm nbn nbr nbs ne- nea neb nee nei nek nem nen ner nes nia nib nie nii nik nim nin nir nis nka nke nki nkk nkm nkn nkr nks nma nmb nme nmi nmk nmm nmn nmr nms nna nnb nne nni nnk nnm nnn nns nra nrb nre nri nrk nrm nrn nrr nrs nsa nsb nse nsi nsk nsm nsn nsr nss ra- raa rab rae rai rak ram ran rar ras rba rbb rbe rbi rbk rbm rbn rbr rbs re- rea reb ree rei rek rem ren rer res ria rib rie rii rik rim rin rir ris rkb rke rkk rkm rks rma rmb rme rmi rmm rmn rmr rms rna rnb rni rnm rnn rnr rns rra rrb rri rrk rrm rrn rrr rrs rsa rsb rse rsi rsk rsm rsn rsr rss saa sab sae sai sak sam san sar sas sba sbb sbe sbi sbk sbm sbn sbr sbs se- sea seb see sei sek sem sen ser ses sia sib sie sii sik sim sin sir sis sk- ska skb ske ski skk skm skr sks sma smb sme smi smk smm smn smr sms sna snb sne sni snk snm snn snr sns sr- sra srb sre sri srk srm srn srr srs ss- ssa ssb sse ssi ssk ssm ssn ssr sss