-ic b-u bbb bbc bbi bbm bbu bby bcb bcc bci bcm bcu bcy bi- bib bic bii bim biu biy bmb bmc bmi bmm bmu bub buc bui bum buu buy by- byc byi bym byu c-- cbb cbc cbi cbm cbu cby ccb ccc cci ccm ccu ci- cib cic cii cim ciu cmb cmc cmi cmm cmu cmy cub cuc cui cum cuu cuy cyb cyc cym ibb ibc ibi ibm ibu iby icb icc ici icm icu icy iib iic iii iim iiu im- imb imc imi imm imu imy iu- iub iuc iui ium iyc iym iyy mbb mbc mbi mbm mbu mc- mcb mcc mci mcm mcu mi- mib mic mii mim miu miy mmb mmc mmi mmm mmu mub muc mui mum muu muy my- myb myc mym myu ubb ubc ubi ubu uby ucb ucc uci ucm ucu uib uic uii uim uiu um- umb umc umi umm umu uuc uum uuu uyc uyi uyu ybc ybi ybm yby ycc yci ycu ycy yii yim ymc ymi ymm yui yum yuu yuy yyb yyc yyu yyy