-er b-u bbb bbe bbg bbm bbo bbr bbs bbu be- beb bee beg bem beo ber bes beu bgb bge bgg bgm bgo bgr bgs bgu bmb bme bmg bmm bmo bmr bms bmu bob boe bog bom boo bor bos bou brb bre brg brm bro brr brs bru bsb bse bsg bsm bso bsr bss bsu bub bue bug bum buo bur bus buu ebb ebe ebg ebm ebo ebr ebs ebu eeb eee eeg eem eeo eer ees egb ege egg egm ego egr egs egu em- emb eme emg emm emo emr ems emu eo- eob eoe eog eom eoo eor eos eou erb ere erg erm ero err ers eru es- esb ese esg esm eso esr ess esu eu- eub eue eug eur eus gbe gbg gbm gbo gbr gbs gbu ge- geb gee geg gem geo ger ges geu ggb ggg ggm ggo ggr ggs ggu gmb gme gmg gmm gmo gmr gms gob goe gog gom goo gor gos gou grb gre grg grm gro grr grs gru gsb gse gsg gsm gso gsr gss gsu gu- gub gue gug gum guo gur gus guu m-o m-r mbb mbe mbg mbm mbo mbr mbs mbu meb mee meg mem meo mer mes meu mgb mge mgm mgo mgr mgs mgu mmb mme mmg mmm mmo mmr mms mmu mob moe mog mom moo mor mos mou mrb mre mrg mrm mro mrr mrs mru msb mse msg msm mso msr mss msu mub mue mug mum mur mus muu ob- obb obe obg obm obo obr obs obu oeb oee oeg oem oeo oer oes oge ogg ogo ogs om- omb ome omg omm omo omr oms omu oo- oob oog oom ooo oor oos or- orb ore org orm oro orr ors oru os- osb ose osg osm oso osr oss osu ou- oue oum ouo our ous rbb rbe rbg rbm rbo rbr rbs rbu re- reb ree reg rem reo rer res reu rgb rge rgg rgo rgr rgs rmb rme rmg rmm rmo rmr rms rob roe rog rom roo ror ros rou rrb rrg rrm rrr rrs rru rsb rse rsg rsm rso rsr rss rsu rub rue rug rum ruo rur rus ruu sbb sbe sbg sbm sbo sbr sbs sbu se- seb see seg sem seo ser ses seu sgb sge sgg sgm sgo sgr sgs sgu smb sme smg smm smo smr sms smu sob soe sog som soo sor sos sou sr- srb sre srg srm sro srr srs ss- ssb sse ssg ssm sso ssr sss ssu sub sue sug sum suo sur sus suu ubb ube ubg ubo ubr ubs ubu ueb uee ueg uem uer ues ugb uge ugg ugm ugo ugr ugs ugu um- umb ume umg umm umo umr ums umu uob uoe uog uom uoo uor uos ur- urb ure urg urm uro urr urs uru usb use usg usm uso usr uss usu uue uug uum uur uus uuu