-er b-u bbb bbc bbd bbe bbm bbo bbr bbt bbu bcb bcc bcd bce bcm bco bcr bct bcu bdb bdc bdd bde bdm bdo bdr bdt bdu be- beb bec bed bee bem beo ber bet beu bmb bmc bmd bme bmm bmo bmr bmt bmu bob boc bod boe bom boo bor bot bou brb brd bre brm bro brr brt bru btb btc btd bte btm bto btr btt btu bub buc bud bue bum buo bur but buu c-- cbb cbc cbd cbe cbm cbo cbr cbt cbu ccb ccc ccd cce ccm cco ccr cct ccu cdb cdc cdd cde cdm cdo cdr cdt cdu ce- ceb cec ced cee cem ceo cer cet ceu cmb cmc cmd cme cmm cmo cmr cmt cmu co- cob coc cod coe com coo cor cot cou crb crc crd cre crm cro crr crt cru ctb ctc ctd cte ctm cto ctr ctt ctu cub cuc cud cue cum cuo cur cut cuu dbb dbc dbd dbe dbm dbo dbr dbt dbu dcb dcc dcd dce dcm dco dcr dct dcu ddb ddc ddd dde ddm ddo ddr ddt ddu de- deb dec ded dee dem deo der det deu dmb dmc dmd dme dmm dmo dmr dmt dmu dob doc dod doe dom doo dor dot dou drb drc drd dre drm dro drr drt dru dtb dtc dtd dte dtm dto dtr dtt dtu dub duc dud due dum duo dur dut ebb ebc ebd ebe ebm ebo ebr ebt ebu ec- ecb ecc ecd ece ecm eco ecr ect ecu ed- edb edc edd ede edm edo edr edt edu eeb eec eed eee eem eeo eer eet em- emb emc emd eme emm emo emr emt emu eo- eob eoc eod eoe eom eoo eor eot eou erb erc erd ere erm ero err ert eru etb etc etd ete etm eto etr ett etu eu- eub euc eud eue eur eut m-o m-r mbb mbc mbd mbe mbm mbo mbr mbt mbu mc- mcb mcc mcd mce mcm mco mcr mct mcu mdb mdc mdd mde mdm mdo mdr mdt mdu meb mec med mee mem meo mer met meu mmb mmc mmd mme mmm mmo mmr mmt mmu mob moc mod moe mom moo mor mot mou mrb mrc mrd mre mrm mro mrr mrt mru mtb mtc mtd mte mtm mto mtr mtt mtu mub muc mud mue mum mur mut muu ob- obb obc obd obe obm obo obr obt obu oc- ocb occ ocd ocm oco ocr oct ocu odb odc odd ode odm odo odr odt odu oeb oec oed oee oem oeo oer oet om- omb omc omd ome omm omo omr omt omu oo- oob ooc ood oom ooo oor oot or- orb orc ord ore orm oro orr ort oru ot- otb otc otd ote otm oto otr ott otu ou- ouc oud oue oum ouo our out rbb rbc rbd rbe rbm rbo rbr rbt rbu rcb rcc rcd rce rcm rco rcr rct rcu rdb rdc rdd rde rdm rdo rdr rdt rdu re- reb rec red ree rem reo rer ret reu rmb rmc rmd rme rmm rmo rmr rmt rob roc rod roe rom roo ror rot rou rrb rrc rrd rrm rrr rrt rru rtb rtc rtd rte rtm rto rtr rtt rtu rub ruc rud rue rum ruo rur rut ruu tbb tbc tbd tbe tbm tbo tbr tbt tbu tcb tcc tcd tce tcm tco tcr tct tcu tdb tdc tdd tde tdm tdo tdr tdt tdu te- teb tec ted tee tem teo ter tet teu tmb tmc tmd tme tmm tmo tmr tmt tmu to- tob toc tod toe tom too tor tot tou trb trc trd tre trm tro trr trt tru ttb ttc ttd tte ttm tto ttr ttt ttu tub tuc tud tue tum tuo tur tut tuu ubb ubc ube ubo ubr ubt ubu ucb ucc ucd uce ucm uco ucr uct ucu udb udc udd ude udm udo udr udt udu ueb uec ued uee uem uer uet um- umb umc umd ume umm umo umr umt umu uob uoc uod uoe uom uoo uor uot ur- urb urc urd ure urm uro urr urt uru utb utc utd ute utm uto utr utt utu uuc uue uum uur uut uuu