-ic b-u bbb bbc bbi bbm bbu bcb bcc bci bcm bcu bi- bib bic bii bim biu bmb bmc bmi bmm bmu bub buc bui bum buu c-- cbb cbc cbi cbm cbu ccb ccc cci ccm ccu ci- cib cic cii cim ciu cmb cmc cmi cmm cmu cub cuc cui cum cuu ibb ibc ibi ibm ibu icb icc ici icm icu iib iic iii iim iiu im- imb imc imi imm imu iu- iub iuc iui ium mbb mbc mbi mbm mbu mc- mcb mcc mci mcm mcu mi- mib mic mii mim miu mmb mmc mmi mmm mmu mub muc mui mum muu ubb ubc ubi ubu ucb ucc uci ucm ucu uib uic uii uim uiu um- umb umc umi umm umu uuc uum uuu