-er -ic bbb bbc bbe bbg bbi bbk bbo bbr bbs bbt bcb bcc bce bcg bci bck bco bcr bcs bct be- beb bec bee beg bei bek beo ber bes bet bgb bgc bge bgg bgi bgk bgo bgr bgs bgt bi- bib bic bie big bii bik bio bir bis bit bkb bkc bke bkg bkk bko bkr bks bkt bob boc boe bog boi bok boo bor bos bot brb bre brg bri brk bro brr brs brt bsb bsc bse bsg bsi bsk bso bsr bss bst btb btc bte btg bti btk bto btr bts btt c-- cbb cbc cbe cbg cbi cbk cbo cbr cbs cbt ccb ccc cce ccg cci cck cco ccr ccs cct ce- ceb cec cee ceg cei cek ceo cer ces cet cgb cgc cge cgg cgi cgo cgr cgs cgt ci- cib cic cie cig cii cik cio cir cis cit ckb ckc cki cko cks ckt co- cob coc coe cog coi cok coo cor cos cot crb crc cre crg cri crk cro crr crs crt csb csc cse csg csi csk cso csr css cst ctb ctc cte ctg cti ctk cto ctr cts ctt ebb ebc ebe ebg ebi ebk ebo ebr ebs ebt ec- ecb ecc ece ecg eci eck eco ecr ecs ect eeb eec eee eeg eek eeo eer ees eet egb egc ege egg egi ego egr egs egt eib eic eie eig eii eik eio eir eis eit ekb ekc eke ekg eki eko ekr eks ekt eo- eob eoc eoe eog eoi eok eoo eor eos eot erb erc ere erg eri erk ero err ers ert es- esb esc ese esg esi esk eso esr ess est etb etc ete etg eti etk eto etr ets ett gbc gbe gbg gbi gbk gbo gbr gbs gbt gcb gcc gce gcg gci gck gco gcr gcs gct ge- geb gec gee geg gei gek geo ger ges get ggb ggc ggg ggi ggo ggr ggs ggt gib gic gie gig gii gik gio gir gis git gkb gko gks gkt gob goc goe gog goi gok goo gor gos got grb grc gre grg gri grk gro grr grs grt gsb gsc gse gsg gsi gsk gso gsr gss gst gtb gtc gte gtg gti gtk gto gtr gts gtt ibb ibc ibe ibg ibi ibk ibo ibr ibs ibt icb icc ice icg ici ick ico icr ics ict ie- iec iee ieg iei iek ier ies iet igb igc ige igg igi igk igo igr igs igt iib iic iie iii iio iir iis iit ikb ikc ike iki ikk iko ikr iks ikt io- iob ioc ioe iog ioi ioo ior ios iot ir- irb irc ire irg iri irk iro irr irs irt is- isb isc ise isg isi isk iso isr iss ist itb itc ite itg iti itk ito its itt k-t kbb kbc kbe kbi kbk kbo kbr kbs kcb kcc kce kcg kci kck kcr kcs kct ke- keb kec kee keg kei kek keo ker kes ket kgb kgc kgi kgo kgs kib kic kie kig kii kik kio kir kis kit kkb kkc kke kki kkk kkr kks kkt kob koc koe kog koi kok koo kor kos kot krc krg kri krk kro krr krs krt ksb ksc kse ksg ksi ksk kso ksr kss kst ktb ktc kte ktg ktk kto ktr kts ktt o-i ob- obb obc obe obg obi obk obo obr obs obt oc- ocb occ ocg oci ock oco ocr ocs oct oeb oec oee oeg oei oeo oer oes oet ogc oge ogg ogi ogo ogs ogt oib oic oie oii oik oio oir ois oit okb okc oke okg oki okk oko okr oks oo- oob ooc oog ooi ook ooo oor oos oot or- orb orc ore org ori ork oro orr ors ort os- osb osc ose osg osi osk oso osr oss ost ot- otb otc ote otg oti otk oto otr ots ott rbb rbc rbe rbg rbi rbk rbo rbr rbs rbt rcb rcc rce rcg rci rco rcr rcs rct re- reb rec ree reg rei rek reo rer res ret rgb rgc rge rgg rgi rgk rgo rgr rgs rgt rib ric rie rig rii rik rio rir ris rit rkb rkc rke rkg rkk rko rks rkt rob roc roe rog roi rok roo ror ros rot rrb rrc rrg rri rrk rrr rrs rrt rsb rsc rse rsg rsi rsk rso rsr rss rst rtb rtc rte rtg rti rtk rto rtr rts rtt sbb sbc sbe sbg sbi sbk sbo sbr sbs sbt scb scc sce scg sci sck sco scr scs sct se- seb sec see seg sei sek seo ser ses set sgb sgc sge sgg sgi sgk sgo sgr sgs sgt sib sic sie sig sii sik sio sir sis sit sk- skb skc ske skg ski skk sko skr sks skt sob soc soe sog soi sok soo sor sos sot sr- srb src sre srg sri srk sro srr srs srt ss- ssb ssc sse ssg ssi ssk sso ssr sss sst stb stc ste stg sti stk sto str sts stt tbb tbc tbe tbg tbi tbk tbo tbr tbs tbt tcb tcc tce tcg tci tck tco tcr tcs tct te- teb tec tee teg tei tek teo ter tes tet tgb tgc tge tgg tgi tgk tgo tgr tgs tgt tib tic tie tig tii tik tio tir tis tit tkb tkc tke tkg tkk tko tkr tks tkt to- tob toc toe tog toi tok too tor tos tot trb trc tre trg tri trk tro trr trs trt tsb tsc tse tsg tsi tsk tso tsr tss tst ttb ttc tte ttg tti ttk tto ttr tts ttt

-ose bbbb bbbs bbci bbeb bbet bbrc bbrg bcbc bcbg bcbs bccc bcci bccs bcec bcer bces bcet bcgs bcie bcis