-ic b-u bbb bbc bbi bbo bbu bcb bcc bci bco bcu bcz bi- bib bic bii bio biu biz bob boc boi boo bou boz bub buc bui buo buu buz bzo bzu bzz c-- cbb cbc cbi cbo cbu cbz ccb ccc cci cco ccu ccz ci- cib cic cii cio ciu co- cob coc coi coo cou coz cub cuc cui cuo cuu cuz cz- czc czo ibb ibc ibi ibo ibu ibz icb icc ici ico icu icz iib iic iii iio iiu io- iob ioc ioi ioo iou iu- iub iuc iui iuz izi izo izu izz o-i ob- obb obc obi obo obu oc- ocb occ oci oco ocu ocz oib oic oii oio oiu oiz oo- oob ooc ooi ooo ou- ouc oui ouo ozo ozu ozz ubb ubc ubi ubo ubu ucb ucc uci uco ucu uib uic uii uio uiu uob uoc uoo uuc uuu uzb uzi uzo uzu zbb zbc zco zib zio ziz zo- zob zoc zoi zoo zou zub zuc zui zuz zzz