bbb bbi bbk bbn bbo bbr bbs bby bi- bib bii bik bin bio bir bis biy bkb bkk bkn bko bkr bks bnb bni bnk bnn bno bnr bns bob boi bok bon boo bor bos boy brb bri brk brn bro brr brs bry bsb bsi bsk bsn bso bsr bss bsy by- byi byk byn byo byr bys ibb ibi ibk ibn ibo ibr ibs iby iib iii iin iio iir iis ikb iki ikk iko ikr iks in- inb ini ink inn ino inr ins iny io- iob ioi ion ioo ior ios ir- irb iri irk irn iro irr irs iry is- isb isi isk isn iso isr iss isy iyo iyr iys iyy kbb kbi kbk kbn kbo kbr kbs kib kii kik kin kio kir kis kkb kki kkk kkn kkr kks kky kn- kni knk knn kno knr kob koi kok kon koo kor kos koy kri krk krn kro krr krs kry ksb ksi ksk ksn kso ksr kss kyn kyo kyr kys n-i nbb nbi nbk nbn nbo nbr nbs nib nii nik nin nio nir nis nki nkk nkn nko nkr nks nky nnb nni nnk nnn nno nns no- nob noi nok non noo nor nos noy nrb nri nrk nrn nro nrr nrs nry nsb nsi nsk nsn nso nsr nss nsy nyk nyn nyo nys nyy o-i ob- obb obi obk obn obo obr obs oby oib oii oik oin oio oir ois okb oki okk oko okr oks on- onb oni onk onn ono onr ons ony oo- oob ooi ook oon ooo oor oos or- orb ori ork orn oro orr ors ory os- osb osi osk osn oso osr oss oyi oyo oys rbb rbi rbk rbn rbo rbr rbs rib rii rik rin rio rir ris riy rkb rkk rko rks rky rnb rni rnn rno rnr rns rny rob roi rok ron roo ror ros roy rrb rri rrk rrn rrr rrs rsb rsi rsk rsn rso rsr rss ry- ryk ryn ryo ryr rys ryy sbb sbi sbk sbn sbo sbr sbs sby sib sii sik sin sio sir sis sk- skb ski skk sko skr sks sky snb sni snk snn sno snr sns sny sob soi sok son soo sor sos soy sr- srb sri srk srn sro srr srs sry ss- ssb ssi ssk ssn sso ssr sss sy- syb syi syk syn syr sys ybi ybr ybs yby yii yin yio yir yis yki ykk ykn ynk ynn yns yny yob yoi yok yon yoo yor yos yoy yrn yro yrs ysb ysi ysk yso ysr yss ysy yyb yys yyy