-ic b-u bbb bbc bbi bbk bbu bcb bcc bci bck bcu bi- bib bic bii bik biu bkb bkc bkk bub buc bui buk buu c-- cbb cbc cbi cbk cbu ccb ccc cci cck ccu ci- cib cic cii cik ciu ckb ckc cki cub cuc cui cuk cuu ibb ibc ibi ibk ibu icb icc ici ick icu iib iic iii iiu ikb ikc iki ikk iku iu- iub iuc iui kbb kbc kbi kbk kbu kcb kcc kci kck kcu kib kic kii kik kiu kkb kkc kki kkk kku kub kuc kui kuk kuu ubb ubc ubi ubk ubu ucb ucc uci uck ucu uib uic uii uiu ukb ukc uki ukk uku uuc uuu