-er b-u bbb bbc bbe bbg bbh bbn bbr bbu bcb bcc bce bcg bch bcn bcr bcu be- beb bec bee beg beh ben ber beu bgb bgc bge bgg bgh bgn bgr bgu bhb bhc bhe bhg bhh bhr bhu bnb bnc bne bng bnn bnr bnu brb bre brg brh brn brr bru bub buc bue bug buh bun bur buu c-- cbb cbc cbe cbg cbh cbn cbr cbu ccb ccc cce ccg cch ccn ccr ccu ce- ceb cec cee ceg ceh cen cer ceu cgb cgc cge cgg cgh cgn cgr cgu ch- chb chc che chg chh chn chr chu cn- cnb cnc cne cng cnh cnn cnr cnu crb crc cre crg crh crn crr cru cub cuc cue cug cuh cun cur cuu ebb ebc ebe ebg ebh ebn ebr ebu ec- ecb ecc ece ecg ech ecn ecr ecu eeb eec eee eeg een eer egb egc ege egg egh egn egr egu ehb ehc ehe ehg ehh ehn ehr ehu en- enb enc ene eng enh enn enr enu erb erc ere erg erh ern err eru eu- eub euc eue eug eun eur gbc gbe gbg gbh gbn gbr gbu gcb gcc gce gcg gch gcn gcr gcu ge- geb gec gee geg geh gen ger geu ggb ggc ggg ggh ggn ggr ggu ghb ghc ghe ghg ghh ghn ghr gnb gnc gne gnn gnr gnu grb grc gre grg grh grn grr gru gu- gub guc gue gug gun gur guu hbb hbc hbe hbg hbh hbn hbr hbu hcb hcc hce hcg hch hcn hcr he- heb hec hee heg heh hen her heu hgb hgc hge hgg hgh hgn hgr hgu hhb hhc hhe hhg hhh hhn hhr hhu hnb hnc hne hng hnh hnn hnu hr- hrb hrc hre hrg hrh hrn hrr hru hub huc hue hug huh hun hur huu nbb nbc nbe nbg nbn nbr nbu ncb ncc nce ncg nch ncn ncr ncu ne- neb nec nee neg neh nen ner neu ngb ngc nge ngg ngh ngn ngu nhb nhc nhe nhg nhh nhn nhr nhu nnb nnc nne nng nnh nnn nnu nrb nrc nre nrg nrn nrr nru nub nuc nue nug nuh nun nur nuu rbb rbc rbe rbg rbh rbn rbr rbu rcb rcc rce rcg rch rcn rcr rcu re- reb rec ree reg reh ren rer reu rgb rgc rge rgg rgh rgn rgr rh- rhb rhc rhe rhg rhh rhn rhr rhu rnb rnc rng rnh rnn rnr rnu rrb rrc rrg rrh rrn rrr rru rub ruc rue rug ruh run rur ruu ubb ubc ube ubg ubh ubn ubr ubu ucb ucc uce ucg uch ucn ucr ucu ueb uec uee ueg ueh uen uer ugb ugc uge ugg ugh ugn ugr ugu uhb uhc uhe uhh uhr uhu un- unb unc une ung unh unn unr unu ur- urb urc ure urg urn urr uru uuc uue uug uun uur uuu