-ic b-u bbb bbc bbi bbk bbo bbu bcb bcc bci bck bco bcu bcv bi- bib bic bii bik bio biu biv bkb bkc bkk bko bkv bob boc boi bok boo bou bov bub buc bui buk buo buu bvb bvc bvi bvk bvo bvu bvv c-- cbb cbc cbi cbk cbo cbu cbv ccb ccc cci cck cco ccu ccv ci- cib cic cii cik cio ciu civ ckb ckc cki cko co- cob coc coi cok coo cou cov cub cuc cui cuk cuo cuu cuv cvb cvc cvi cvk cvo cvu cvv i-v ibb ibc ibi ibk ibo ibu ibv icb icc ici ick ico icu icv iib iic iii iio iiu ikb ikc iki ikk iko iku ikv io- iob ioc ioi ioo iou iov iu- iub iuc iui ivb ivc ivi ivo ivu ivv kbb kbc kbi kbk kbo kbu kcb kcc kci kck kcu kib kic kii kik kio kiu kiv kkb kkc kki kkk kku kkv kob koc koi kok koo kou kub kuc kui kuk kuu kvb kvi kvk kvo kvv o-i ob- obb obc obi obk obo obu obv oc- ocb occ oci ock oco ocu ocv oib oic oii oik oio oiu oiv okb okc oki okk oko oku oo- oob ooc ooi ook ooo oov ou- ouc oui ouk ouo ov- ovb ovc ovi ovo ovv ubb ubc ubi ubk ubo ubu ubv ucb ucc uci uck uco ucu ucv uib uic uii uio uiu ukb ukc uki ukk uku uob uoc uok uoo uuc uuu uvb uvc uvo uvu uvv vbc vbi vbk vbo vbv vcc vci vco vcu vi- vib vic vii vik vio viu viv vkb vob voc voi vok voo vou vov vuk vuv vvb vvc vvi vvo vvv