-er b-u bbb bbc bbe bbm bbo bbr bbt bbu bcb bcc bce bcm bco bcr bct bcu be- beb bec bee bem beo ber bet beu bmb bmc bme bmm bmo bmr bmt bmu bob boc boe bom boo bor bot bou brb bre brm bro brr brt bru btb btc bte btm bto btr btt btu bub buc bue bum buo bur but buu c-- cbb cbc cbe cbm cbo cbr cbt cbu ccb ccc cce ccm cco ccr cct ccu ce- ceb cec cee cem ceo cer cet ceu cmb cmc cme cmm cmo cmr cmt cmu co- cob coc coe com coo cor cot cou crb crc cre crm cro crr crt cru ctb ctc cte ctm cto ctr ctt ctu cub cuc cue cum cuo cur cut cuu ebb ebc ebe ebm ebo ebr ebt ebu ec- ecb ecc ece ecm eco ecr ect ecu eeb eec eee eem eeo eer eet em- emb emc eme emm emo emr emt emu eo- eob eoc eoe eom eoo eor eot eou erb erc ere erm ero err ert eru etb etc ete etm eto etr ett etu eu- eub euc eue eur eut m-o m-r mbb mbc mbe mbm mbo mbr mbt mbu mc- mcb mcc mce mcm mco mcr mct mcu meb mec mee mem meo mer met meu mmb mmc mme mmm mmo mmr mmt mmu mob moc moe mom moo mor mot mou mrb mrc mre mrm mro mrr mrt mru mtb mtc mte mtm mto mtr mtt mtu mub muc mue mum mur mut muu ob- obb obc obe obm obo obr obt obu oc- ocb occ ocm oco ocr oct ocu oeb oec oee oem oeo oer oet om- omb omc ome omm omo omr omt omu oo- oob ooc oom ooo oor oot or- orb orc ore orm oro orr ort oru ot- otb otc ote otm oto otr ott otu ou- ouc oue oum ouo our out rbb rbc rbe rbm rbo rbr rbt rbu rcb rcc rce rcm rco rcr rct rcu re- reb rec ree rem reo rer ret reu rmb rmc rme rmm rmo rmr rmt rob roc roe rom roo ror rot rou rrb rrc rrm rrr rrt rru rtb rtc rte rtm rto rtr rtt rtu rub ruc rue rum ruo rur rut ruu tbb tbc tbe tbm tbo tbr tbt tbu tcb tcc tce tcm tco tcr tct tcu te- teb tec tee tem teo ter tet teu tmb tmc tme tmm tmo tmr tmt tmu to- tob toc toe tom too tor tot tou trb trc tre trm tro trr trt tru ttb ttc tte ttm tto ttr ttt ttu tub tuc tue tum tuo tur tut tuu ubb ubc ube ubo ubr ubt ubu ucb ucc uce ucm uco ucr uct ucu ueb uec uee uem uer uet um- umb umc ume umm umo umr umt umu uob uoc uoe uom uoo uor uot ur- urb urc ure urm uro urr urt uru utb utc ute utm uto utr utt utu uuc uue uum uur uut uuu