-er -ic b-u bbb bbc bbe bbi bbk bbo bbr bbs bbt bbu bcb bcc bce bci bck bco bcr bcs bct bcu bcv be- beb bec bee bei bek beo ber bes bet beu bev bi- bib bic bie bii bik bio bir bis bit biu biv bkb bkc bke bkk bko bkr bks bkt bkv bob boc boe boi bok boo bor bos bot bou bov brb bre bri brk bro brr brs brt bru brv bsb bsc bse bsi bsk bso bsr bss bst bsu bsv btb btc bte bti btk bto btr bts btt btu btv bub buc bue bui buk buo bur bus but buu bvb bvc bve bvi bvk bvo bvr bvs bvt bvu bvv c-- cbb cbc cbe cbi cbk cbo cbr cbs cbt cbu cbv ccb ccc cce cci cck cco ccr ccs cct ccu ccv ce- ceb cec cee cei cek ceo cer ces cet ceu cev ci- cib cic cie cii cik cio cir cis cit ciu civ ckb ckc cki cko cks ckt co- cob coc coe coi cok coo cor cos cot cou cov crb crc cre cri crk cro crr crs crt cru crv csb csc cse csi csk cso csr css cst csu csv ctb ctc cte cti ctk cto ctr cts ctt ctu ctv cub cuc cue cui cuk cuo cur cus cut cuu cuv cvb cvc cve cvi cvk cvo cvr cvs cvt cvu cvv ebb ebc ebe ebi ebk ebo ebr ebs ebt ebu ebv ec- ecb ecc ece eci eck eco ecr ecs ect ecu ecv eeb eec eee eek eeo eer ees eet eev eib eic eie eii eik eio eir eis eit eiu eiv ekb ekc eke eki eko ekr eks ekt eku ekv eo- eob eoc eoe eoi eok eoo eor eos eot eou erb erc ere eri erk ero err ers ert eru erv es- esb esc ese esi esk eso esr ess est esu esv etb etc ete eti etk eto etr ets ett etu etv eu- eub euc eue eui eur eus eut euv evb evc eve evi evo evr evs evt evv i-v ibb ibc ibe ibi ibk ibo ibr ibs ibt ibu ibv icb icc ice ici ick ico icr ics ict icu icv ie- iec iee iei iek ier ies iet iev iib iic iie iii iio iir iis iit iiu ikb ikc ike iki ikk iko ikr iks ikt iku ikv io- iob ioc ioe ioi ioo ior ios iot iou iov ir- irb irc ire iri irk iro irr irs irt iru irv is- isb isc ise isi isk iso isr iss ist isu isv itb itc ite iti itk ito its itt itu itv iu- iub iuc iue iui iur ius iut ivb ivc ive ivi ivo ivr ivs ivt ivu ivv k-t kbb kbc kbe kbi kbk kbo kbr kbs kbu kcb kcc kce kci kck kcr kcs kct kcu ke- keb kec kee kei kek keo ker kes ket kev kib kic kie kii kik kio kir kis kit kiu kiv kkb kkc kke kki kkk kkr kks kkt kku kkv kob koc koe koi kok koo kor kos kot kou krc kri krk kro krr krs krt kru krv ksb ksc kse ksi ksk kso ksr kss kst ksu ksv ktb ktc kte ktk kto ktr kts ktt ktu ktv kub kuc kue kui kuk kur kus kut kuu kvb kvi kvk kvo kvr kvs kvv o-i ob- obb obc obe obi obk obo obr obs obt obu obv oc- ocb occ oci ock oco ocr ocs oct ocu ocv oeb oec oee oei oeo oer oes oet oib oic oie oii oik oio oir ois oit oiu oiv okb okc oke oki okk oko okr oks oku oo- oob ooc ooi ook ooo oor oos oot oov or- orb orc ore ori ork oro orr ors ort oru orv os- osb osc ose osi osk oso osr oss ost osu osv ot- otb otc ote oti otk oto otr ots ott otu otv ou- ouc oue oui ouk ouo our ous out ov- ovb ovc ove ovi ovo ovs ovv rbb rbc rbe rbi rbk rbo rbr rbs rbt rbu rcb rcc rce rci rco rcr rcs rct rcu rcv re- reb rec ree rei rek reo rer res ret reu rev rib ric rie rii rik rio rir ris rit riv rkb rkc rke rkk rko rks rkt rku rkv rob roc roe roi rok roo ror ros rot rou rov rrb rrc rri rrk rrr rrs rrt rru rsb rsc rse rsi rsk rso rsr rss rst rsu rsv rtb rtc rte rti rtk rto rtr rts rtt rtu rtv rub ruc rue rui ruk ruo rur rus rut ruu ruv rvb rvc rve rvi rvo rvr rvs rvt rvu rvv sbb sbc sbe sbi sbk sbo sbr sbs sbt sbu sbv scb scc sce sci sck sco scr scs sct scu scv se- seb sec see sei sek seo ser ses set seu sev sib sic sie sii sik sio sir sis sit siu siv sk- skb skc ske ski skk sko skr sks skt sku sob soc soe soi sok soo sor sos sot sou sov sr- srb src sre sri srk sro srr srs srt srv ss- ssb ssc sse ssi ssk sso ssr sss sst ssu ssv stb stc ste sti stk sto str sts stt stu stv sub suc sue sui suk suo sur sus sut suu suv svb svc sve svi svk svo svr svs svt svu svv tbb tbc tbe tbi tbk tbo tbr tbs tbt tbu tbv tcb tcc tce tci tck tco tcr tcs tct tcu tcv te- teb tec tee tei tek teo ter tes tet teu tev tib tic tie tii tik tio tir tis tit tiu tiv tkb tkc tke tkk tko tkr tks tkt to- tob toc toe toi tok too tor tos tot tou tov trb trc tre tri trk