-ic bbb bbc bbd bbe bbi bbk bbo bcb bcc bcd bce bci bck bco bcv bdb bdc bdd bde bdi bdk bdo bdv be- beb bec bed bee bei bek beo bev bi- bib bic bid bie bii bik bio biv bkb bkc bke bkk bko bkv bob boc bod boe boi bok boo bov bvb bvc bvd bve bvi bvk bvo bvv c-- cbb cbc cbd cbe cbi cbk cbo cbv ccb ccc ccd cce cci cck cco ccv cdb cdc cdd cde cdi cdk cdo cdv ce- ceb cec ced cee cei cek ceo cev ci- cib cic cid cie cii cik cio civ ckb ckc ckd cki cko co- cob coc cod coe coi cok coo cov cvb cvc cvd cve cvi cvk cvo cvv dbb dbc dbd dbe dbi dbk dbo dbv dcb dcc dcd dce dci dck dco dcv ddb ddc ddd dde ddi ddk ddo de- deb dec ded dee dei dek deo dev di- dib dic did die dii dik dio div dkb dkc dke dki dkk dko dob doc dod doe doi dok doo dov dvb dvc dvd dve dvi dvk ebb ebc ebd ebe ebi ebk ebo ebv ec- ecb ecc ecd ece eci eck eco ecv ed- edb edc edd ede edi edk edo eeb eec eed eee eek eeo eev eib eic eid eie eii eik eio eiv ekb ekc ekd eke eki eko ekv eo- eob eoc eod eoe eoi eok eoo evb evc evd eve evi evo evv i-d i-v ibb ibc ibd ibe ibi ibk ibo ibv icb icc icd ice ici ick ico icv idb idc idd ide idi idk ido idv ie- iec ied iee iei iek iev iib iic iid iie iii iio ikb ikc ike iki ikk iko ikv io- iob ioc iod ioe ioi ioo iov ivb ivc ivd ive ivi ivo ivv kbb kbc kbd kbe kbi kbk kbo kcb kcc kcd kce kci kck kdb kdc kde kdk kdo ke- keb kec ked kee kei kek keo kev kib kic kid kie kii kik kio kiv kkb kkc kke kki kkk kkv kob koc kod koe koi kok koo kvb kvi kvk kvo kvv o-i ob- obb obc obd obe obi obk obo obv oc- ocb occ ocd oci ock oco ocv odb odc odd ode odi odo odv oeb oec oed oee oei oeo oib oic oid oie oii oik oio oiv okb okc okd oke oki okk oko oo- oob ooc ood ooi ook ooo oov ov- ovb ovc ovd ove ovi ovo ovv v-e vbc vbd vbi vbk vbo vbv vcc vcd vce vci vco vdb vdc vdd vde vdi vdk vdo vdv veb vec ved vee vei vek veo vi- vib vic vid vie vii vik vio viv vkb vob voc vod voe voi vok voo vov vvb vvc vvi vvo vvv