-er b-u bbb bbc bbe bbg bbn bbo bbr bbt bbu bcb bcc bce bcg bcn bco bcr bct bcu be- beb bec bee beg ben beo ber bet beu bgb bgc bge bgg bgn bgo bgr bgt bgu bnb bnc bne bng bnn bno bnr bnt bnu bob boc boe bog bon boo bor bot bou brb bre brg brn bro brr brt bru btb btc bte btg btn bto btr btt btu bub buc bue bug bun buo bur but buu c-- cbb cbc cbe cbg cbn cbo cbr cbt cbu ccb ccc cce ccg ccn cco ccr cct ccu ce- ceb cec cee ceg cen ceo cer cet ceu cgb cgc cge cgg cgn cgo cgr cgt cgu cn- cnb cnc cne cng cnn cno cnr cnt cnu co- cob coc coe cog con coo cor cot cou crb crc cre crg crn cro crr crt cru ctb ctc cte ctg ctn cto ctr ctt ctu cub cuc cue cug cun cuo cur cut cuu ebb ebc ebe ebg ebn ebo ebr ebt ebu ec- ecb ecc ece ecg ecn eco ecr ect ecu eeb eec eee eeg een eeo eer eet egb egc ege egg egn ego egr egt egu en- enb enc ene eng enn eno enr ent enu eo- eob eoc eoe eog eon eoo eor eot eou erb erc ere erg ern ero err ert eru etb etc ete etg etn eto etr ett etu eu- eub euc eue eug eun eur eut gbc gbe gbg gbn gbo gbr gbt gbu gcb gcc gce gcg gcn gco gcr gct gcu ge- geb gec gee geg gen geo ger get geu ggb ggc ggg ggn ggo ggr ggt ggu gnb gnc gne gnn gno gnr gnt gnu gob goc goe gog gon goo gor got gou grb grc gre grg grn gro grr grt gru gtb gtc gte gtg gtn gto gtr gtt gtu gu- gub guc gue gug gun guo gur gut guu nbb nbc nbe nbg nbn nbo nbr nbt nbu ncb ncc nce ncg ncn nco ncr nct ncu ne- neb nec nee neg nen neo ner net neu ngb ngc nge ngg ngn ngo ngt ngu nnb nnc nne nng nnn nno nnt nnu no- nob noc noe nog non noo nor not nou nrb nrc nre nrg nrn nro nrr nrt nru ntb ntc nte ntg ntn nto ntr ntt ntu nub nuc nue nug nun nuo nur nut nuu ob- obb obc obe obg obn obo obr obt obu oc- ocb occ ocg ocn oco ocr oct ocu oeb oec oee oeg oen oeo oer oet ogc oge ogg ogn ogo ogt on- onb onc one ong onn ono onr ont onu oo- oob ooc oog oon ooo oor oot or- orb orc ore org orn oro orr ort oru ot- otb otc ote otg otn oto otr ott otu ou- ouc oue oun ouo our out rbb rbc rbe rbg rbn rbo rbr rbt rbu rcb rcc rce rcg rcn rco rcr rct rcu re- reb rec ree reg ren reo rer ret reu rgb rgc rge rgg rgn rgo rgr rgt rnb rnc rng rnn rno rnr rnt rnu rob roc roe rog ron roo ror rot rou rrb rrc rrg rrn rrr rrt rru rtb rtc rte rtg rtn rto rtr rtt rtu rub ruc rue rug run ruo rur rut ruu tbb tbc tbe tbg tbn tbo tbr tbt tbu tcb tcc tce tcg tcn tco tcr tct tcu te- teb tec tee teg ten teo ter tet teu tgb tgc tge tgg tgn tgo tgr tgt tgu tnb tnc tne tng tnn tno tnr tnt to- tob toc toe tog ton too tor tot tou trb trc tre trg trn tro trr trt tru ttb ttc tte ttg ttn tto ttr ttt ttu tub tuc tue tug tun tuo tur tut tuu ubb ubc ube ubg ubn ubo ubr ubt ubu ucb ucc uce ucg ucn uco ucr uct ucu ueb uec uee ueg uen uer uet ugb ugc uge ugg ugn ugo ugr ugt ugu un- unb unc une ung unn uno unr unt unu uob uoc uoe uog uon uoo uor uot ur- urb urc ure urg urn uro urr urt uru utb utc ute utn uto utr utt utu uuc uue uug uun uur uut uuu