-ey bbb bbe bbk bbn bbo bbs bby be- beb bee bek ben beo bes bev bey bkb bke bkk bkn bko bks bkv bnb bne bnk bnn bno bns bnv bob boe bok bon boo bos bov boy bsb bse bsk bsn bso bss bsv bsy bvb bve bvk bvn bvo bvs bvv by- bye byk byn byo bys ebb ebe ebk ebn ebo ebs ebv eby eeb eee eek een eeo ees eev eey ekb eke eko eks ekv eky en- enb ene enk enn eno ens env eny eo- eob eoe eok eon eoo eos es- esb ese esk esn eso ess esv esy evb eve evn evo evs evv evy eye eyn eyo eys kbb kbe kbk kbn kbo kbs ke- keb kee kek ken keo kes kev key kkb kke kkk kkn kks kkv kky kn- kne knk knn kno kob koe kok kon koo kos koy ksb kse ksk ksn kso kss ksv kvb kvk kvn kvo kvs kvv kye kyn kyo kys nbb nbe nbk nbn nbo nbs nbv ne- neb nee nek nen neo nes nev ney nke nkk nkn nko nks nky nnb nne nnk nnn nno nns nnv no- nob noe nok non noo nos nov noy nsb nse nsk nsn nso nss nsv nsy nvb nve nvk nvn nvv nye nyk nyn nyo nys nyy ob- obb obe obk obn obo obs obv oby oeb oee oen oeo oes oey okb oke okk oko oks on- onb one onk onn ono ons ony oo- oob ook oon ooo oos oov os- osb ose osk osn oso oss osv ov- ovb ove ovo ovs ovv oye oyo oys sbb sbe sbk sbn sbo sbs sbv sby se- seb see sek sen seo ses sev sey sk- skb ske skk sko sks sky snb sne snk snn sno sns snv sny sob soe sok son soo sos sov soy ss- ssb sse ssk ssn sso sss ssv svb sve svk svn svo svs svv svy sy- syb sye syk syn sys v-e vbk vbo vbs vbv veb vee vek ven veo ves vey vkb vn- vno vns vnv vob voe vok von voo vos vov voy vsb vse vsk vsn vso vss vsv vvb vvo vvs vvv vye vyn ybe ybs yby yeb yee yek yen yeo yes yev yey ykk ykn yne ynk ynn yns yny yob yoe yok yon yoo yos yoy ysb yse ysk yso yss ysy yve yvo yvy yyb yye yys yyy