-ic bbb bbc bbi bbn bbo bbr bcb bcc bci bcn bco bcr bcv bi- bib bic bii bin bio bir biv bnb bnc bni bnn bno bnr bnv bob boc boi bon boo bor bov brb bri brn bro brr brv bvb bvc bvi bvn bvo bvr bvv c-- cbb cbc cbi cbn cbo cbr cbv ccb ccc cci ccn cco ccr ccv ci- cib cic cii cin cio cir civ cn- cnb cnc cni cnn cno cnr cnv co- cob coc coi con coo cor cov crb crc cri crn cro crr crv cvb cvc cvi cvn cvo cvr cvv i-v ibb ibc ibi ibn ibo ibr ibv icb icc ici icn ico icr icv iib iic iii iin iio iir in- inb inc ini inn ino inr inv io- iob ioc ioi ion ioo ior iov ir- irb irc iri irn iro irr irv ivb ivc ivi ivo ivr ivv n-i nbb nbc nbi nbn nbo nbr nbv ncb ncc nci ncn nco ncr ncv nib nic nii nin nio nir niv nnb nnc nni nnn nno nnv no- nob noc noi non noo nor nov nrb nrc nri nrn nro nrr nrv nvb nvc nvi nvn nvv o-i ob- obb obc obi obn obo obr obv oc- ocb occ oci ocn oco ocr ocv oib oic oii oin oio oir oiv on- onb onc oni onn ono onr oo- oob ooc ooi oon ooo oor oov or- orb orc ori orn oro orr orv ov- ovb ovc ovi ovo ovv rbb rbc rbi rbn rbo rbr rcb rcc rci rcn rco rcr rcv rib ric rii rin rio rir riv rnb rnc rni rnn rno rnr rnv rob roc roi ron roo ror rov rrb rrc rri rrn rrr rvb rvc rvi rvn rvo rvr rvv vbc vbi vbo vbr vbv vcc vci vcn vco vcr vi- vib vic vii vin vio vir viv vn- vni vno vnr vnv vob voc voi von voo vor vov vrb vrc vri vrn vrr vvb vvc vvi vvo vvr vvv