-ic bbb bbc bbh bbi bbk bbn bbo bbr bcb bcc bch bci bck bcn bco bcr bhb bhc bhh bhi bhk bho bhr bi- bib bic bih bii bik bin bio bir bkb bkc bkk bkn bko bkr bnb bnc bni bnk bnn bno bnr bob boc boh boi bok bon boo bor brb brh bri brk brn bro brr c-- cbb cbc cbh cbi cbk cbn cbo cbr ccb ccc cch cci cck ccn cco ccr ch- chb chc chh chi chk chn cho chr ci- cib cic cih cii cik cin cio cir ckb ckc ckh cki cko cn- cnb cnc cnh cni cnn cno cnr co- cob coc coh coi cok con coo cor crb crc crh cri crk crn cro crr h-i hbb hbc hbh hbi hbk hbn hbo hbr hcb hcc hch hci hck hcn hco hcr hhb hhc hhh hhi hhk hhn hho hhr hib hic hih hii hik hin hio hir hkb hkh hki hkk hkn hko hkr hnb hnc hnh hnk hnn hno hob hoc hoh hoi hok hon hoo hor hr- hrb hrc hrh hri hrk hrn hro hrr ibb ibc ibh ibi ibk ibn ibo ibr icb icc ich ici ick icn ico icr ihb ihc ihh ihi ihk ihn iho ihr iib iic iih iii iin iio iir ikb ikc iki ikk iko ikr in- inb inc inh ini ink inn ino inr io- iob ioc ioh ioi ion ioo ior ir- irb irc iri irk irn iro irr kbb kbc kbh kbi kbk kbn kbo kbr kcb kcc kch kci kck kcn kcr khh khi khk khn kho khr kib kic kih kii kik kin kio kir kkb kkc kkh kki kkk kkn kkr kn- knc kni knk knn kno knr kob koc koh koi kok kon koo kor krc kri krk krn kro krr n-i nbb nbc nbi nbk nbn nbo nbr ncb ncc nch nci nck ncn nco ncr nhb nhc nhh nhi nhk nhn nhr nib nic nih nii nik nin nio nir nkc nki nkk nkn nko nkr nnb nnc nnh nni nnk nnn nno no- nob noc noh noi nok non noo nor nrb nrc nri nrk nrn nro nrr o-i ob- obb obc obh obi obk obn obo obr oc- ocb occ och oci ock ocn oco ocr ohc ohh ohi ohn oho ohr oib oic oii oik oin oio oir okb okc oki okk oko okr on- onb onc onh oni onk onn ono onr oo- oob ooc ooh ooi ook oon ooo oor or- orb orc orh ori ork orn oro orr rbb rbc rbh rbi rbk rbn rbo rbr rcb rcc rch rci rcn rco rcr rh- rhb rhc rhh rhi rhn rho rhr rib ric rih rii rik rin rio rir rkb rkc rkk rko rnb rnc rnh rni rnn rno rnr rob roc roh roi rok ron roo ror rrb rrc rrh rri rrk rrn rrr