-er a-a a-b a-i aaa aab aad aae aai aak aam aar aas ab- aba abb abd abe abi abk abm abr abs ad- ada adb add ade adi adk adm adr ads aea aeb aed aee aei aek aem aer aes ai- aia aib aid aie aii aik aim air ais aka akb akd ake aki akk akm akr aks ama amb amd ame ami amk amm amr ams ar- ara arb ard are ari ark arm arr ars as- asa asb asd ase asi ask asm asr ass baa bab bad bae bai bak bam bar bas bba bbb bbd bbe bbi bbk bbm bbr bbs bda bdb bdd bde bdi bdk bdm bdr bds be- bea beb bed bee bei bek bem ber bes bi- bia bib bid bie bii bik bim bir bis bka bkb bke bkk bkm bkr bks bma bmb bmd bme bmi bmk bmm bmr bms bra brb brd bre bri brk brm brr brs bsa bsb bsd bse bsi bsk bsm bsr bss daa dab dad dae dai dak dam dar das dba dbb dbd dbe dbi dbk dbm dbr dbs dda ddb ddd dde ddi ddk ddm ddr dds de- dea deb ded dee dei dek dem der des di- dia dib did die dii dik dim dir dis dka dkb dke dki dkk dkm dkr dks dma dmb dmd dme dmi dmk dmm dmr dms dra drb drd dre dri drk drm drr drs dsa dsb dsd dse dsi dsk dsm dsr dss eaa eab ead eae eai eak eam ear eas eba ebb ebd ebe ebi ebk ebm ebr ebs ed- eda edb edd ede edi edk edm edr eds eea eeb eed eee eek eem eer ees eia eib eid eie eii eik eim eir eis eka ekb ekd eke eki ekr eks em- ema emb emd eme emi emk emm emr ems era erb erd ere eri erk erm err ers es- esa esb esd ese esi esk esm esr ess i-d ia- iaa iab iad iae iai iam iar ias iba ibb ibd ibe ibi ibk ibm ibr ibs ida idb idd ide idi idk idm idr ids ie- iea ied iee iei iek iem ier ies iia iib iid iie iii iim iir iis ika ikb ike iki ikk ikr iks im- ima imb imd ime imi imm ims ir- ira irb ird ire iri irk irm irr irs is- isa isb isd ise isi isk ism isr iss ka- kaa kab kad kae kai kak kam kar kas kba kbb kbd kbe kbi kbk kbm kbr kbs kda kdb kde kdk kdm kdr kds ke- kea keb ked kee kei kek kem ker kes kia kib kid kie kii kik kim kir kis kkb kke kki kkk kkm kkr kks kma kmb kmd kme kmi kmk kmm kms kra krd kri krk krr krs ksa ksb ksd kse ksi ksk ksm ksr kss m-r maa mab mad mae mai mak mam mar mas mba mbb mbd mbe mbi mbk mbm mbr mbs mda mdb mdd mde mdi mdk mdm mdr mds mea meb med mee mei mek mem mer mes mi- mia mib mid mie mii mik mim mir mis mka mkb mkd mke mkk mkm mkr mks mma mmb mmd mme mmi mmk mmm mmr mms mra mrb mrd mre mri mrk mrm mrr mrs msa msb msd mse msi msk msm msr mss ra- raa rab rad rae rai rak ram rar ras rba rbb rbd rbe rbi rbk rbm rbr rbs rda rdb rdd rde rdi rdm rdr rds re- rea reb red ree rei rek rem rer res ria rib rid rie rii rik rim rir ris rkb rke rkk rkm rks rma rmb rmd rme rmi rmm rmr rms rra rrb rrd rri rrk rrm rrr rrs rsa rsb rsd rse rsi rsk rsm rsr rss saa sab sad sae sai sak sam sar sas sba sbb sbd sbe sbi sbk sbm sbr sbs sda sdb sdd sde sdi sdk sdm sdr sds se- sea seb sed see sei sek sem ser ses sia sib sid sie sii sik sim sir sis sk- ska skb skd ske ski skk skm skr sks sma smb smd sme smi smk smm smr sms sr- sra srb srd sre sri srk srm srr srs ss- ssa ssb ssd sse ssi ssk ssm ssr sss