-ic b-u bbb bbc bbi bbk bbo bbt bbu bcb bcc bci bck bco bct bcu bcv bi- bib bic bii bik bio bit biu biv bkb bkc bkk bko bkt bkv bob boc boi bok boo bot bou bov btb btc bti btk bto btt btu btv bub buc bui buk buo but buu bvb bvc bvi bvk bvo bvt bvu bvv c-- cbb cbc cbi cbk cbo cbt cbu cbv ccb ccc cci cck cco cct ccu ccv ci- cib cic cii cik cio cit ciu civ ckb ckc cki cko ckt co- cob coc coi cok coo cot cou cov ctb ctc cti ctk cto ctt ctu ctv cub cuc cui cuk cuo cut cuu cuv cvb cvc cvi cvk cvo cvt cvu cvv i-v ibb ibc ibi ibk ibo ibt ibu ibv icb icc ici ick ico ict icu icv iib iic iii iio iit iiu ikb ikc iki ikk iko ikt iku ikv io- iob ioc ioi ioo iot iou iov itb itc iti itk ito itt itu itv iu- iub iuc iui iut ivb ivc ivi ivo ivt ivu ivv k-t kbb kbc kbi kbk kbo kbu kcb kcc kci kck kct kcu kib kic kii kik kio kit kiu kiv kkb kkc kki kkk kkt kku kkv kob koc koi kok koo kot kou ktb ktc ktk kto ktt ktu ktv kub kuc kui kuk kut kuu kvb kvi kvk kvo kvv o-i ob- obb obc obi obk obo obt obu obv oc- ocb occ oci ock oco oct ocu ocv oib oic oii oik oio oit oiu oiv okb okc oki okk oko oku oo- oob ooc ooi ook ooo oot oov ot- otb otc oti otk oto ott otu otv ou- ouc oui ouk ouo out ov- ovb ovc ovi ovo ovv tbb tbc tbi tbk tbo tbt tbu tbv tcb tcc tci tck tco tct tcu tcv tib tic tii tik tio tit tiu tiv tkb tkc tkk tko tkt to- tob toc toi tok too tot tou tov ttb ttc tti ttk tto ttt ttu ttv tub tuc tui tuk tuo tut tuu tuv tvb tvc tvi tvk tvo tvt tvu ubb ubc ubi ubk ubo ubt ubu ubv ucb ucc uci uck uco uct ucu ucv uib uic uii uio uit uiu ukb ukc uki ukk uku uob uoc uok uoo uot utb utc uti utk uto utt utu utv uuc uut uuu uvb uvc uvo uvu uvv vbc vbi vbk vbo vbv vcc vci vco vct vcu vi- vib vic vii vik vio vit viu viv vkb vkt vob voc voi vok voo vot vou vov vtb vtc vti vtk vto vtt vtu vtv vuk vut vuv vvb vvc vvi vvo vvt vvv