b-u bbb bbc bbd bbe bbk bbo bbu bcb bcc bcd bce bck bco bcu bcv bdb bdc bdd bde bdk bdo bdu bdv be- beb bec bed bee bek beo beu bev bkb bkc bke bkk bko bkv bob boc bod boe bok boo bou bov bub buc bud bue buk buo buu bvb bvc bvd bve bvk bvo bvu bvv c-- cbb cbc cbd cbe cbk cbo cbu cbv ccb ccc ccd cce cck cco ccu ccv cdb cdc cdd cde cdk cdo cdu cdv ce- ceb cec ced cee cek ceo ceu cev ckb ckc ckd cko co- cob coc cod coe cok coo cou cov cub cuc cud cue cuk cuo cuu cuv cvb cvc cvd cve cvk cvo cvu cvv dbb dbc dbd dbe dbk dbo dbu dbv dcb dcc dcd dce dck dco dcu dcv ddb ddc ddd dde ddk ddo ddu de- deb dec ded dee dek deo deu dev dkb dkc dke dkk dko dku dob doc dod doe dok doo dou dov dub duc dud due duk duo duv dvb dvc dvd dve dvk dvu ebb ebc ebd ebe ebk ebo ebu ebv ec- ecb ecc ecd ece eck eco ecu ecv ed- edb edc edd ede edk edo edu eeb eec eed eee eek eeo eev ekb ekc ekd eke eko eku ekv eo- eob eoc eod eoe eok eoo eou eu- eub euc eud eue euv evb evc evd eve evo evv kbb kbc kbd kbe kbk kbo kbu kcb kcc kcd kce kck kcu kdb kdc kde kdk kdo kdu ke- keb kec ked kee kek keo kev kkb kkc kke kkk kku kkv kob koc kod koe kok koo kou kub kuc kud kue kuk kuu kvb kvk kvo kvv ob- obb obc obd obe obk obo obu obv oc- ocb occ ocd ock oco ocu ocv odb odc odd ode odo odu odv oeb oec oed oee oeo okb okc okd oke okk oko oku oo- oob ooc ood ook ooo oov ou- ouc oud oue ouk ouo ov- ovb ovc ovd ove ovo ovv ubb ubc ube ubk ubo ubu ubv ucb ucc ucd uce uck uco ucu ucv udb udc udd ude udk udo udu udv ueb uec ued uee ukb ukc uke ukk uku uob uoc uod uoe uok uoo uuc uue uuu uvb uvc uve uvo uvu uvv v-e vbc vbd vbk vbo vbv vcc vcd vce vco vcu vdb vdc vdd vde vdk vdo vdu vdv veb vec ved vee vek veo veu vkb vob voc vod voe vok voo vou vov vue vuk vuv vvb vvc vvo vvv