-er b-u bbb bbc bbe bbg bbk bbm bbo bbr bbt bbu bcb bcc bce bcg bck bcm bco bcr bct bcu be- beb bec bee beg bek bem beo ber bet beu bgb bgc bge bgg bgk bgm bgo bgr bgt bgu bkb bkc bke bkg bkk bkm bko bkr bkt bmb bmc bme bmg bmk bmm bmo bmr bmt bmu bob boc boe bog bok bom boo bor bot bou brb bre brg brk brm bro brr brt bru btb btc bte btg btk btm bto btr btt btu bub buc bue bug buk bum buo bur but buu c-- cbb cbc cbe cbg cbk cbm cbo cbr cbt cbu ccb ccc cce ccg cck ccm cco ccr cct ccu ce- ceb cec cee ceg cek cem ceo cer cet ceu cgb cgc cge cgg cgm cgo cgr cgt cgu ckb ckc ckm cko ckt cmb cmc cme cmg cmk cmm cmo cmr cmt cmu co- cob coc coe cog cok com coo cor cot cou crb crc cre crg crk crm cro crr crt cru ctb ctc cte ctg ctk ctm cto ctr ctt ctu cub cuc cue cug cuk cum cuo cur cut cuu ebb ebc ebe ebg ebk ebm ebo ebr ebt ebu ec- ecb ecc ece ecg eck ecm eco ecr ect ecu eeb eec eee eeg eek eem eeo eer eet egb egc ege egg egm ego egr egt egu ekb ekc eke ekg eko ekr ekt eku em- emb emc eme emg emk emm emo emr emt emu eo- eob eoc eoe eog eok eom eoo eor eot eou erb erc ere erg erk erm ero err ert eru etb etc ete etg etk etm eto etr ett etu eu- eub euc eue eug eur eut gbc gbe gbg gbk gbm gbo gbr gbt gbu gcb gcc gce gcg gck gcm gco gcr gct gcu ge- geb gec gee geg gek gem geo ger get geu ggb ggc ggg ggm ggo ggr ggt ggu gkb gkm gko gkt gmb gmc gme gmg gmm gmo gmr gmt gob goc goe gog gok gom goo gor got gou grb grc gre grg grk grm gro grr grt gru gtb gtc gte gtg gtk gtm gto gtr gtt gtu gu- gub guc gue gug guk gum guo gur gut guu k-t kbb kbc kbe kbk kbm kbo kbr kbu kcb kcc kce kcg kck kcm kcr kct kcu ke- keb kec kee keg kek kem keo ker ket kgb kgc kgm kgo kgu kkb kkc kke kkk kkm kkr kkt kku kmb kmc kme kmg kmk kmm kmo kmt kmu kob koc koe kog kok kom koo kor kot kou krc krg krk kro krr krt kru ktb ktc kte ktg ktk ktm kto ktr ktt ktu kub kuc kue kug kuk kum kur kut kuu m-o m-r mbb mbc mbe mbg mbk mbm mbo mbr mbt mbu mc- mcb mcc mce mcg mck mcm mco mcr mct mcu meb mec mee meg mek mem meo mer met meu mgb mgc mge mgk mgm mgo mgr mgt mgu mkb mkc mke mkg mkk mkm mko mkr mkt mku mmb mmc mme mmg mmk mmm mmo mmr mmt mmu mob moc moe mog mok mom moo mor mot mou mrb mrc mre mrg mrk mrm mro mrr mrt mru mtb mtc mte mtg mtk mtm mto mtr mtt mtu mub muc mue mug muk mum mur mut muu ob- obb obc obe obg obk obm obo obr obt obu oc- ocb occ ocg ock ocm oco ocr oct ocu oeb oec oee oeg oem oeo oer oet ogc oge ogg ogo ogt okb okc oke okg okk oko okr oku om- omb omc ome omg omm omo omr omt omu oo- oob ooc oog ook oom ooo oor oot or- orb orc ore org ork orm oro orr ort oru ot- otb otc ote otg otk otm oto otr ott otu ou- ouc oue ouk oum ouo our out rbb rbc rbe rbg rbk rbm rbo rbr rbt rbu rcb rcc rce rcg rcm rco rcr rct rcu re- reb rec ree reg rek rem reo rer ret reu rgb rgc rge rgg rgk rgo rgr rgt rkb rkc rke rkg rkk rkm rko rkt rku rmb rmc rme rmg rmm rmo rmr rmt rob roc roe rog rok rom roo ror rot rou rrb rrc rrg rrk rrm rrr rrt rru rtb rtc rte rtg rtk rtm rto rtr rtt rtu rub ruc rue rug ruk rum ruo rur rut ruu tbb tbc tbe tbg tbk tbm tbo tbr tbt tbu tcb tcc tce tcg tck tcm tco tcr tct tcu te- teb tec tee teg tek tem teo ter tet teu tgb tgc tge tgg tgk tgm tgo tgr tgt tgu tkb tkc tke tkg tkk tkm tko tkr tkt tmb tmc tme tmg tmk tmm tmo tmr tmt tmu to- tob toc toe tog tok tom too tor tot tou trb trc tre trg trk trm tro trr trt tru ttb ttc tte ttg ttk ttm tto ttr ttt ttu tub tuc tue tug tuk tum tuo tur tut tuu ubb ubc ube ubg ubk ubo ubr ubt ubu ucb ucc uce ucg uck ucm uco ucr uct ucu ueb uec uee ueg uem uer uet ugb ugc uge ugg ugk ugm ugo ugr ugt ugu ukb ukc uke ukk ukr uku um- umb umc ume umg umm umo umr umt umu uob uoc uoe uog uok uom uoo uor uot ur- urb urc ure urg urk urm uro urr urt uru utb utc ute utk utm uto utr utt utu uuc uue uug uum uur uut uuu