-er -ic bbb bbc bbe bbi bbk bbm bbo bbr bcb bcc bce bci bck bcm bco bcr bcv be- beb bec bee bei bek bem beo ber bev bi- bib bic bie bii bik bim bio bir biv bkb bkc bke bkk bkm bko bkr bkv bmb bmc bme bmi bmk bmm bmo bmr bmv bob boc boe boi bok bom boo bor bov brb bre bri brk brm bro brr brv bvb bvc bve bvi bvk bvm bvo bvr bvv c-- cbb cbc cbe cbi cbk cbm cbo cbr cbv ccb ccc cce cci cck ccm cco ccr ccv ce- ceb cec cee cei cek cem ceo cer cev ci- cib cic cie cii cik cim cio cir civ ckb ckc cki ckm cko cmb cmc cme cmi cmk cmm cmo cmr cmv co- cob coc coe coi cok com coo cor cov crb crc cre cri crk crm cro crr crv cvb cvc cve cvi cvk cvm cvo cvr cvv ebb ebc ebe ebi ebk ebm ebo ebr ebv ec- ecb ecc ece eci eck ecm eco ecr ecv eeb eec eee eek eem eeo eer eev eib eic eie eii eik eim eio eir eiv ekb ekc eke eki eko ekr ekv em- emb emc eme emi emk emm emo emr emv eo- eob eoc eoe eoi eok eom eoo eor erb erc ere eri erk erm ero err erv evb evc eve evi evm evo evr evv i-v ibb ibc ibe ibi ibk ibm ibo ibr ibv icb icc ice ici ick icm ico icr icv ie- iec iee iei iek iem ier iev iib iic iie iii iim iio iir ikb ikc ike iki ikk iko ikr ikv im- imb imc ime imi imm imo imv io- iob ioc ioe ioi iom ioo ior iov ir- irb irc ire iri irk irm iro irr irv ivb ivc ive ivi ivo ivr ivv kbb kbc kbe kbi kbk kbm kbo kbr kcb kcc kce kci kck kcm kcr ke- keb kec kee kei kek kem keo ker kev kib kic kie kii kik kim kio kir kiv kkb kkc kke kki kkk kkm kkr kkv kmb kmc kme kmi kmk kmm kmo kob koc koe koi kok kom koo kor krc kri krk kro krr krv kvb kvi kvk kvm kvo kvr kvv m-o m-r m-v mbb mbc mbe mbi mbk mbm mbo mbr mbv mc- mcb mcc mce mci mck mcm mco mcr mcv meb mec mee mei mek mem meo mer mev mi- mib mic mie mii mik mim mio mir miv mkb mkc mke mkk mkm mko mkr mkv mmb mmc mme mmi mmk mmm mmo mmr mmv mob moc moe moi mok mom moo mor mov mrb mrc mre mri mrk mrm mro mrr mrv mvb mvc mve mvi mvm mvo mvr mvv o-i ob- obb obc obe obi obk obm obo obr obv oc- ocb occ oci ock ocm oco ocr ocv oeb oec oee oei oem oeo oer oib oic oie oii oik oim oio oir oiv okb okc oke oki okk oko okr om- omb omc ome omi omm omo omr omv oo- oob ooc ooi ook oom ooo oor oov or- orb orc ore ori ork orm oro orr orv ov- ovb ovc ove ovi ovo ovv rbb rbc rbe rbi rbk rbm rbo rbr rcb rcc rce rci rcm rco rcr rcv re- reb rec ree rei rek rem reo rer rev rib ric rie rii rik rim rio rir riv rkb rkc rke rkk rkm rko rkv rmb rmc rme rmi rmm rmo rmr rmv rob roc roe roi rok rom roo ror rov rrb rrc rri rrk rrm rrr rvb rvc rve rvi rvm rvo rvr rvv v-e vbc vbi vbk vbm vbo vbr vbv vcc vce vci vcm vco vcr veb vec vee vei vek vem veo ver vi- vib vic vie vii vik vim vio vir viv vkb vkm vm- vmc vmi vmm vmo vmr vob voc voe voi vok vom voo vor vov vrb vrc vre vri vrk vrm vrr vvb vvc vvi vvm vvo vvr vvv