-th b-u bbb bbc bbg bbh bbk bbo bbr bbt bbu bcb bcc bcg bch bck bco bcr bct bcu bgb bgc bgg bgh bgk bgo bgr bgt bgu bhb bhc bhg bhh bhk bho bhr bht bhu bkb bkc bkg bkk bko bkr bkt bob boc bog boh bok boo bor bot bou brb brg brh brk bro brr brt bru btb btc btg bth btk bto btr btt btu bub buc bug buh buk buo bur but buu c-- cbb cbc cbg cbh cbk cbo cbr cbt cbu ccb ccc ccg cch cck cco ccr cct ccu cgb cgc cgg cgh cgo cgr cgt cgu ch- chb chc chg chh chk cho chr cht chu ckb ckc ckh cko ckt co- cob coc cog coh cok coo cor cot cou crb crc crg crh crk cro crr crt cru ctb ctc ctg cth ctk cto ctr ctt ctu cub cuc cug cuh cuk cuo cur cut cuu gbc gbg gbh gbk gbo gbr gbt gbu gcb gcc gcg gch gck gco gcr gct gcu ggb ggc ggg ggh ggo ggr ggt ggu ghb ghc ghg ghh gho ghr ght gkb gkh gko gkt gob goc gog goh gok goo gor got gou grb grc grg grh grk gro grr grt gru gtb gtc gtg gth gtk gto gtr gtt gtu gu- gub guc gug guk guo gur gut guu hbb hbc hbg hbh hbk hbo hbr hbt hbu hcb hcc hcg hch hck hco hcr hct hgb hgc hgg hgh hgk hgo hgr hgt hgu hhb hhc hhg hhh hhk hho hhr hht hhu hkb hkg hkh hkk hko hkr hkt hku hob hoc hog hoh hok hoo hor hot hou hr- hrb hrc hrg hrh hrk hro hrr hrt hru htb htc htg hth htk hto htr htt hub huc hug huh huk huo hur hut huu k-t kbb kbc kbh kbk kbo kbr kbu kcb kcc kcg kch kck kcr kct kcu kgb kgc kgh kgo kgu khh khk kho khr khu kkb kkc kkh kkk kkr kkt kku kob koc kog koh kok koo kor kot kou krc krg krk kro krr krt kru ktb ktc ktg kth ktk kto ktr ktt ktu kub kuc kug kuh kuk kur kut kuu ob- obb obc obg obh obk obo obr obt obu oc- ocb occ ocg och ock oco ocr oct ocu ogc ogg ogh ogo ogt ohc ohg ohh oho ohr oht ohu okb okc okg okk oko okr oku oo- oob ooc oog ooh ook ooo oor oot or- orb orc org orh ork oro orr ort oru ot- otb otc otg oth otk oto otr ott otu ou- ouc ouh ouk ouo our out rbb rbc rbg rbh rbk rbo rbr rbt rbu rcb rcc rcg rch rco rcr rct rcu rgb rgc rgg rgh rgk rgo rgr rgt rh- rhb rhc rhg rhh rho rhr rht rhu rkb rkc rkg rkk rko rkt rku rob roc rog roh rok roo ror rot rou rrb rrc rrg rrh rrk rrr rrt rru rtb rtc rtg rtk rto rtr rtt rtu rub ruc rug ruh ruk ruo rur rut ruu tbb tbc tbg tbh tbk tbo tbr tbt tbu tcb tcc tcg tch tck tco tcr tct tcu tgb tgc tgg tgh tgk tgo tgr tgt tgu th- thb thc thg thh thk tho thr tht thu tkb tkc tkg tkk tko tkr tkt to- tob toc tog toh tok too tor tot tou trb trc trg trh trk tro trr trt tru ttb ttc ttg tth ttk tto ttr ttt ttu tub tuc tug tuh tuk tuo tur tut tuu ubb ubc ubg ubh ubk ubo ubr ubt ubu ucb ucc ucg uch uck uco ucr uct ucu ugb ugc ugg ugh ugk ugo ugr ugt ugu uhb uhc uhh uho uhr uht uhu ukb ukc ukk ukr uku uob uoc uog uok uoo uor uot ur- urb urc urg urk uro urr urt uru utb utc uth utk uto utr utt utu uuc uug uur uut uuu