-ic bbb bbc bbi bbk bbn bbo bbr bby bcb bcc bci bck bcn bco bcr bcy bi- bib bic bii bik bin bio bir biy bkb bkc bkk bkn bko bkr bnb bnc bni bnk bnn bno bnr bob boc boi bok bon boo bor boy brb bri brk brn bro brr bry by- byc byi byk byn byo byr c-- cbb cbc cbi cbk cbn cbo cbr cby ccb ccc cci cck ccn cco ccr ci- cib cic cii cik cin cio cir ckb ckc cki cko cky cn- cnb cnc cni cnn cno cnr cny co- cob coc coi cok con coo cor coy crb crc cri crk crn cro crr cry cyb cyc cyk cyn cyo cyr ibb ibc ibi ibk ibn ibo ibr iby icb icc ici ick icn ico icr icy iib iic iii iin iio iir ikb ikc iki ikk iko ikr in- inb inc ini ink inn ino inr iny io- iob ioc ioi ion ioo ior ir- irb irc iri irk irn iro irr iry iyc iyo iyr iyy kbb kbc kbi kbk kbn kbo kbr kcb kcc kci kck kcn kcr kib kic kii kik kin kio kir kkb kkc kki kkk kkn kkr kky kn- knc kni knk knn kno knr kob koc koi kok kon koo kor koy krc kri krk krn kro krr kry kyc kyn kyo kyr n-i nbb nbc nbi nbk nbn nbo nbr ncb ncc nci nck ncn nco ncr nib nic nii nik nin nio nir nkc nki nkk nkn nko nkr nky nnb nnc nni nnk nnn nno no- nob noc noi nok non noo nor noy nrb nrc nri nrk nrn nro nrr nry nyc nyk nyn nyo nyy o-i ob- obb obc obi obk obn obo obr oby oc- ocb occ oci ock ocn oco ocr oib oic oii oik oin oio oir okb okc oki okk oko okr on- onb onc oni onk onn ono onr ony oo- oob ooc ooi ook oon ooo oor or- orb orc ori ork orn oro orr ory oyi oyo rbb rbc rbi rbk rbn rbo rbr rcb rcc rci rcn rco rcr rib ric rii rik rin rio rir riy rkb rkc rkk rko rky rnb rnc rni rnn rno rnr rny rob roc roi rok ron roo ror roy rrb rrc rri rrk rrn rrr ry- ryc ryk ryn ryo ryr ryy ybc ybi ybr yby ycc yci yco ycy yii yin yio yir yki ykk ykn ynk ynn yny yob yoc yoi yok yon yoo yor yoy yrc yrn yro yyb yyc yyy