-er b-u bbb bbc bbe bbm bbn bbo bbr bbt bbu bcb bcc bce bcm bcn bco bcr bct bcu be- beb bec bee bem ben beo ber bet beu bmb bmc bme bmm bmn bmo bmr bmt bmu bnb bnc bne bnn bno bnr bnt bnu bob boc boe bom bon boo bor bot bou brb bre brm brn bro brr brt bru btb btc bte btm btn bto btr btt btu bub buc bue bum bun buo bur but buu c-- cbb cbc cbe cbm cbn cbo cbr cbt cbu ccb ccc cce ccm ccn cco ccr cct ccu ce- ceb cec cee cem cen ceo cer cet ceu cmb cmc cme cmm cmn cmo cmr cmt cmu cn- cnb cnc cne cnm cnn cno cnr cnt cnu co- cob coc coe com con coo cor cot cou crb crc cre crm crn cro crr crt cru ctb ctc cte ctm ctn cto ctr ctt ctu cub cuc cue cum cun cuo cur cut cuu ebb ebc ebe ebm ebn ebo ebr ebt ebu ec- ecb ecc ece ecm ecn eco ecr ect ecu eeb eec eee eem een eeo eer eet em- emb emc eme emm emn emo emr emt emu en- enb enc ene enm enn eno enr ent enu eo- eob eoc eoe eom eon eoo eor eot eou erb erc ere erm ern ero err ert eru etb etc ete etm etn eto etr ett etu eu- eub euc eue eun eur eut m-o m-r mbb mbc mbe mbm mbo mbr mbt mbu mc- mcb mcc mce mcm mcn mco mcr mct mcu meb mec mee mem men meo mer met meu mmb mmc mme mmm mmn mmo mmr mmt mmu mnb mnc mne mnm mnn mno mnr mnt mnu mob moc moe mom mon moo mor mot mou mrb mrc mre mrm mrn mro mrr mrt mru mtb mtc mte mtm mtn mto mtr mtt mtu mub muc mue mum mun mur mut muu nbb nbc nbe nbm nbn nbo nbr nbt nbu ncb ncc nce ncm ncn nco ncr nct ncu ne- neb nec nee nem nen neo ner net neu nmb nmc nme nmm nmn nmo nmr nmt nmu nnb nnc nne nnm nnn nno nnt nnu no- nob noc noe nom non noo nor not nou nrb nrc nre nrm nrn nro nrr nrt nru ntb ntc nte ntm ntn nto ntr ntt ntu nub nuc nue num nun nuo nur nut nuu ob- obb obc obe obm obn obo obr obt obu oc- ocb occ ocm ocn oco ocr oct ocu oeb oec oee oem oen oeo oer oet om- omb omc ome omm omn omo omr omt omu on- onb onc one onn ono onr ont onu oo- oob ooc oom oon ooo oor oot or- orb orc ore orm orn oro orr ort oru ot- otb otc ote otm otn oto otr ott otu ou- ouc oue oum oun ouo our out rbb rbc rbe rbm rbn rbo rbr rbt rbu rcb rcc rce rcm rcn rco rcr rct rcu re- reb rec ree rem ren reo rer ret reu rmb rmc rme rmm rmn rmo rmr rmt rnb rnc rnm rnn rno rnr rnt rnu rob roc roe rom ron roo ror rot rou rrb rrc rrm rrn rrr rrt rru rtb rtc rte rtm rtn rto rtr rtt rtu rub ruc rue rum run ruo rur rut ruu tbb tbc tbe tbm tbn tbo tbr tbt tbu tcb tcc tce tcm tcn tco tcr tct tcu te- teb tec tee tem ten teo ter tet teu tmb tmc tme tmm tmn tmo tmr tmt tmu tnb tnc tne tnm tnn tno tnr tnt to- tob toc toe tom ton too tor tot tou trb trc tre trm trn tro trr trt tru ttb ttc tte ttm ttn tto ttr ttt ttu tub tuc tue tum tun tuo tur tut tuu ubb ubc ube ubn ubo ubr ubt ubu ucb ucc uce ucm ucn uco ucr uct ucu ueb uec uee uem uen uer uet um- umb umc ume umm umn umo umr umt umu un- unb unc une unm unn uno unr unt unu uob uoc uoe uom uon uoo uor uot ur- urb urc ure urm urn uro urr urt uru utb utc ute utm utn uto utr utt utu uuc uue uum uun uur uut uuu