-ic b-u bbb bbc bbi bbo bbu bby bcb bcc bci bco bcu bcy bi- bib bic bii bio biu biy bob boc boi boo bou boy bub buc bui buo buu buy by- byc byi byo byu c-- cbb cbc cbi cbo cbu cby ccb ccc cci cco ccu ci- cib cic cii cio ciu co- cob coc coi coo cou coy cub cuc cui cuo cuu cuy cyb cyc cyo ibb ibc ibi ibo ibu iby icb icc ici ico icu icy iib iic iii iio iiu io- iob ioc ioi ioo iou iu- iub iuc iui iyc iyo iyy o-i ob- obb obc obi obo obu oby oc- ocb occ oci oco ocu oib oic oii oio oiu oo- oob ooc ooi ooo ou- ouc oui ouo oyi oyo ubb ubc ubi ubo ubu uby ucb ucc uci uco ucu uib uic uii uio uiu uob uoc uoo uuc uuu uyc uyi uyo uyu ybc ybi yby ycc yci yco ycu ycy yii yio yob yoc yoi yoo you yoy yui yuo yuu yuy yyb yyc yyu yyy