-er b-u bbb bbc bbd bbe bbm bbo bbr bbu bcb bcc bcd bce bcm bco bcr bcu bdb bdc bdd bde bdm bdo bdr bdu be- beb bec bed bee bem beo ber beu bmb bmc bmd bme bmm bmo bmr bmu bob boc bod boe bom boo bor bou brb brd bre brm bro brr bru bub buc bud bue bum buo bur buu c-- cbb cbc cbd cbe cbm cbo cbr cbu ccb ccc ccd cce ccm cco ccr ccu cdb cdc cdd cde cdm cdo cdr cdu ce- ceb cec ced cee cem ceo cer ceu cmb cmc cmd cme cmm cmo cmr cmu co- cob coc cod coe com coo cor cou crb crc crd cre crm cro crr cru cub cuc cud cue cum cuo cur cuu dbb dbc dbd dbe dbm dbo dbr dbu dcb dcc dcd dce dcm dco dcr dcu ddb ddc ddd dde ddm ddo ddr ddu de- deb dec ded dee dem deo der deu dmb dmc dmd dme dmm dmo dmr dmu dob doc dod doe dom doo dor dou drb drc drd dre drm dro drr dru dub duc dud due dum duo dur ebb ebc ebd ebe ebm ebo ebr ebu ec- ecb ecc ecd ece ecm eco ecr ecu ed- edb edc edd ede edm edo edr edu eeb eec eed eee eem eeo eer em- emb emc emd eme emm emo emr emu eo- eob eoc eod eoe eom eoo eor eou erb erc erd ere erm ero err eru eu- eub euc eud eue eur m-o m-r mbb mbc mbd mbe mbm mbo mbr mbu mc- mcb mcc mcd mce mcm mco mcr mcu mdb mdc mdd mde mdm mdo mdr mdu meb mec med mee mem meo mer meu mmb mmc mmd mme mmm mmo mmr mmu mob moc mod moe mom moo mor mou mrb mrc mrd mre mrm mro mrr mru mub muc mud mue mum mur muu ob- obb obc obd obe obm obo obr obu oc- ocb occ ocd ocm oco ocr ocu odb odc odd ode odm odo odr odu oeb oec oed oee oem oeo oer om- omb omc omd ome omm omo omr omu oo- oob ooc ood oom ooo oor or- orb orc ord ore orm oro orr oru ou- ouc oud oue oum ouo our rbb rbc rbd rbe rbm rbo rbr rbu rcb rcc rcd rce rcm rco rcr rcu rdb rdc rdd rde rdm rdo rdr rdu re- reb rec red ree rem reo rer reu rmb rmc rmd rme rmm rmo rmr rob roc rod roe rom roo ror rou rrb rrc rrd rrm rrr rru rub ruc rud rue rum ruo rur ruu ubb ubc ube ubo ubr ubu ucb ucc ucd uce ucm uco ucr ucu udb udc udd ude udm udo udr udu ueb uec ued uee uem uer um- umb umc umd ume umm umo umr umu uob uoc uod uoe uom uoo uor ur- urb urc urd ure urm uro urr uru uuc uue uum uur uuu