-ic bbb bbc bbi bbk bbm bbo bbr bbt bcb bcc bci bck bcm bco bcr bct bi- bib bic bii bik bim bio bir bit bkb bkc bkk bkm bko bkr bkt bmb bmc bmi bmk bmm bmo bmr bmt bob boc boi bok bom boo bor bot brb bri brk brm bro brr brt btb btc bti btk btm bto btr btt c-- cbb cbc cbi cbk cbm cbo cbr cbt ccb ccc cci cck ccm cco ccr cct ci- cib cic cii cik cim cio cir cit ckb ckc cki ckm cko ckt cmb cmc cmi cmk cmm cmo cmr cmt co- cob coc coi cok com coo cor cot crb crc cri crk crm cro crr crt ctb ctc cti ctk ctm cto ctr ctt ibb ibc ibi ibk ibm ibo ibr ibt icb icc ici ick icm ico icr ict iib iic iii iim iio iir iit ikb ikc iki ikk iko ikr ikt im- imb imc imi imm imo imt io- iob ioc ioi iom ioo ior iot ir- irb irc iri irk irm iro irr irt itb itc iti itk itm ito itt k-t kbb kbc kbi kbk kbm kbo kbr kcb kcc kci kck kcm kcr kct kib kic kii kik kim kio kir kit kkb kkc kki kkk kkm kkr kkt kmb kmc kmi kmk kmm kmo kmt kob koc koi kok kom koo kor kot krc kri krk kro krr krt ktb ktc ktk ktm kto ktr ktt m-o m-r mbb mbc mbi mbk mbm mbo mbr mbt mc- mcb mcc mci mck mcm mco mcr mct mi- mib mic mii mik mim mio mir mit mkb mkc mkk mkm mko mkr mkt mmb mmc mmi mmk mmm mmo mmr mmt mob moc moi mok mom moo mor mot mrb mrc mri mrk mrm mro mrr mrt mtb mtc mti mtk mtm mto mtr mtt o-i ob- obb obc obi obk obm obo obr obt oc- ocb occ oci ock ocm oco ocr oct oib oic oii oik oim oio oir oit okb okc oki okk oko okr om- omb omc omi omm omo omr omt oo- oob ooc ooi ook oom ooo oor oot or- orb orc ori ork orm oro orr ort ot- otb otc oti otk otm oto otr ott rbb rbc rbi rbk rbm rbo rbr rbt rcb rcc rci rcm rco rcr rct rib ric rii rik rim rio rir rit rkb rkc rkk rkm rko rkt rmb rmc rmi rmm rmo rmr rmt rob roc roi rok rom roo ror rot rrb rrc rri rrk rrm rrr rrt rtb rtc rti rtk rtm rto rtr rtt tbb tbc tbi tbk tbm tbo tbr tbt tcb tcc tci tck tcm tco tcr tct tib tic tii tik tim tio tir tit tkb tkc tkk tkm tko tkr tkt tmb tmc tmi tmk tmm tmo tmr tmt to- tob toc toi tok tom too tor tot trb trc tri trk trm tro trr trt ttb ttc tti ttk ttm tto ttr ttt