-ic bbb bbc bbi bbo bbr bcb bcc bci bco bcr bcv bcz bi- bib bic bii bio bir biv biz bob boc boi boo bor bov boz brb bri bro brr brv brz bvb bvc bvi bvo bvr bvv bzo bzr bzz c-- cbb cbc cbi cbo cbr cbv cbz ccb ccc cci cco ccr ccv ccz ci- cib cic cii cio cir civ co- cob coc coi coo cor cov coz crb crc cri cro crr crv crz cvb cvc cvi cvo cvr cvv cvz cz- czc czo i-v ibb ibc ibi ibo ibr ibv ibz icb icc ici ico icr icv icz iib iic iii iio iir io- iob ioc ioi ioo ior iov ir- irb irc iri iro irr irv ivb ivc ivi ivo ivr ivv izi izo izz o-i ob- obb obc obi obo obr obv oc- ocb occ oci oco ocr ocv ocz oib oic oii oio oir oiv oiz oo- oob ooc ooi ooo oor oov or- orb orc ori oro orr orv orz ov- ovb ovc ovi ovo ovv ozo ozz rbb rbc rbi rbo rbr rcb rcc rci rco rcr rcv rib ric rii rio rir riv riz rob roc roi roo ror rov roz rrb rrc rri rrr rvb rvc rvi rvo rvr rvv rzb rzo vbc vbi vbo vbr vbv vbz vcc vci vco vcr vi- vib vic vii vio vir viv viz vob voc voi voo vor vov voz vrb vrc vri vrr vvb vvc vvi vvo vvr vvv vvz zbb zbc zbr zbv zco zib zio zir ziv ziz zo- zob zoc zoi zoo zor zro zvi zzr zzz