a-a a-b a-i aaa aab aae aai aak aam aao aas ab- aba abb abe abi abk abm abo abs aea aeb aee aei aek aem aeo aes ai- aia aib aie aii aik aim aio ais aka akb ake aki akk akm ako aks ama amb ame ami amk amm amo ams aoa aob aoe aoi aok aom aoo aos as- asa asb ase asi ask asm aso ass baa bab bae bai bak bam bao bas bba bbb bbe bbi bbk bbm bbo bbs be- bea beb bee bei bek bem beo bes bi- bia bib bie bii bik bim bio bis bka bkb bke bkk bkm bko bks bma bmb bme bmi bmk bmm bmo bms boa bob boe boi bok bom boo bos bsa bsb bse bsi bsk bsm bso bss eaa eab eae eai eak eam eao eas eba ebb ebe ebi ebk ebm ebo ebs eea eeb eee eek eem eeo ees eia eib eie eii eik eim eio eis eka ekb eke eki eko eks em- ema emb eme emi emk emm emo ems eo- eoa eob eoe eoi eok eom eoo eos es- esa esb ese esi esk esm eso ess ia- iaa iab iae iai iam iao ias iba ibb ibe ibi ibk ibm ibo ibs ie- iea iee iei iek iem ies iia iib iie iii iim iio iis ika ikb ike iki ikk iko iks im- ima imb ime imi imm imo ims io- ioa iob ioe ioi iom ioo ios is- isa isb ise isi isk ism iso iss ka- kaa kab kae kai kak kam kao kas kba kbb kbe kbi kbk kbm kbo kbs ke- kea keb kee kei kek kem keo kes kia kib kie kii kik kim kio kis kkb kke kki kkk kkm kks kma kmb kme kmi kmk kmm kmo kms koa kob koe koi kok kom koo kos ksa ksb kse ksi ksk ksm kso kss m-o maa mab mae mai mak mam mao mas mba mbb mbe mbi mbk mbm mbo mbs mea meb mee mei mek mem meo mes mi- mia mib mie mii mik mim mio mis mka mkb mke mkk mkm mko mks mma mmb mme mmi mmk mmm mmo mms moa mob moe moi mok mom moo mos msa msb mse msi msk msm mso mss o-i oaa oab oae oai oak oam oao oas ob- oba obb obe obi obk obm obo obs oea oeb oee oei oem oeo oes oia oib oie oii oik oim oio ois oka okb oke oki okk oko oks om- oma omb ome omi omm omo oms oo- ooa oob ooi ook oom ooo oos os- osa osb ose osi osk osm oso oss saa sab sae sai sak sam sao sas sba sbb sbe sbi sbk sbm sbo sbs se- sea seb see sei sek sem seo ses sia sib sie sii sik sim sio sis sk- ska skb ske ski skk skm sko sks sma smb sme smi smk smm smo sms soa sob soe soi sok som soo sos ss- ssa ssb sse ssi ssk ssm sso sss