bbb bbi bbk bbn bbo bbs bbt bby bi- bib bii bik bin bio bis bit biy bkb bkk bkn bko bks bkt bnb bni bnk bnn bno bns bnt bob boi bok bon boo bos bot boy bsb bsi bsk bsn bso bss bst bsy btb bti btk btn bto bts btt bty by- byi byk byn byo bys byt ibb ibi ibk ibn ibo ibs ibt iby iib iii iin iio iis iit ikb iki ikk iko iks ikt in- inb ini ink inn ino ins int iny io- iob ioi ion ioo ios iot is- isb isi isk isn iso iss ist isy itb iti itk itn ito its itt ity iyo iys iyt iyy k-t kbb kbi kbk kbn kbo kbs kib kii kik kin kio kis kit kkb kki kkk kkn kks kkt kky kn- kni knk knn kno knt kob koi kok kon koo kos kot koy ksb ksi ksk ksn kso kss kst ktb ktk ktn kto kts ktt kyn kyo kys kyt n-i nbb nbi nbk nbn nbo nbs nbt nib nii nik nin nio nis nit nki nkk nkn nko nks nkt nky nnb nni nnk nnn nno nns nnt no- nob noi nok non noo nos not noy nsb nsi nsk nsn nso nss nst nsy ntb nti ntk ntn nto nts ntt nyk nyn nyo nys nyt nyy o-i ob- obb obi obk obn obo obs obt oby oib oii oik oin oio ois oit okb oki okk oko oks on- onb oni onk onn ono ons ont ony oo- oob ooi ook oon ooo oos oot os- osb osi osk osn oso oss ost ot- otb oti otk otn oto ots ott oyi oyo oys sbb sbi sbk sbn sbo sbs sbt sby sib sii sik sin sio sis sit sk- skb ski skk sko sks skt sky snb sni snk snn sno sns snt sny sob soi sok son soo sos sot soy ss- ssb ssi ssk ssn sso sss sst stb sti stk stn sto sts stt sty sy- syb syi syk syn sys syt tbb tbi tbk tbn tbo tbs tbt tib tii tik tin tio tis tit tiy tkb tkk tko tks tkt tky tnb tni tnk tnn tno tns tnt to- tob toi tok ton too tos tot toy tsb tsi tsk tsn tso tss tst tsy ttb tti ttk ttn tto tts ttt tty tyn tyo tys tyt ybi ybs yby yii yin yio yis yit yki ykk ykn ynk ynn yns yny yob yoi yok yon yoo yos yot yoy ysb ysi ysk yso yss yst ysy ytk ytn yto yts ytt yyb yys yyt yyy