-er -ic b-u bbb bbc bbe bbg bbi bbk bbn bbr bbu bcb bcc bce bcg bci bck bcn bcr bcu be- beb bec bee beg bei bek ben ber beu bgb bgc bge bgg bgi bgk bgn bgr bgu bi- bib bic bie big bii bik bin bir biu bkb bkc bke bkg bkk bkn bkr bnb bnc bne bng bni bnk bnn bnr bnu brb bre brg bri brk brn brr bru bub buc bue bug bui buk bun bur buu c-- cbb cbc cbe cbg cbi cbk cbn cbr cbu ccb ccc cce ccg cci cck ccn ccr ccu ce- ceb cec cee ceg cei cek cen cer ceu cgb cgc cge cgg cgi cgn cgr cgu ci- cib cic cie cig cii cik cin cir ciu ckb ckc cki cn- cnb cnc cne cng cni cnn cnr cnu crb crc cre crg cri crk crn crr cru cub cuc cue cug cui cuk cun cur cuu ebb ebc ebe ebg ebi ebk ebn ebr ebu ec- ecb ecc ece ecg eci eck ecn ecr ecu eeb eec eee eeg eek een eer egb egc ege egg egi egn egr egu eib eic eie eig eii eik ein eir eiu ekb ekc eke ekg eki ekr eku en- enb enc ene eng eni enk enn enr enu erb erc ere erg eri erk ern err eru eu- eub euc eue eug eui eun eur gbc gbe gbg gbi gbk gbn gbr gbu gcb gcc gce gcg gci gck gcn gcr gcu ge- geb gec gee geg gei gek gen ger geu ggb ggc ggg ggi ggn ggr ggu gib gic gie gig gii gik gin gir giu gkb gkn gnb gnc gne gni gnn gnr gnu grb grc gre grg gri grk grn grr gru gu- gub guc gue gug gui guk gun gur guu ibb ibc ibe ibg ibi ibk ibn ibr ibu icb icc ice icg ici ick icn icr icu ie- iec iee ieg iei iek ien ier igb igc ige igg igi igk ign igr igu iib iic iie iii iin iir iiu ikb ikc ike iki ikk ikr iku in- inb inc ine ing ini ink inn inr inu ir- irb irc ire irg iri irk irn irr iru iu- iub iuc iue iug iui iur kbb kbc kbe kbi kbk kbn kbr kbu kcb kcc kce kcg kci kck kcn kcr kcu ke- keb kec kee keg kei kek ken ker kgb kgc kgi kgu kib kic kie kig kii kik kin kir kiu kkb kkc kke kki kkk kkn kkr kku kn- knc kne kng kni knk knn knr knu krc krg kri krk krn krr kru kub kuc kue kug kui kuk kun kur kuu n-i nbb nbc nbe nbg nbi nbk nbn nbr nbu ncb ncc nce ncg nci nck ncn ncr ncu ne- neb nec nee neg nei nek nen ner neu ngb ngc nge ngg ngi ngk ngn ngu nib nic nie nig nii nik nin nir niu nkc nke nki nkk nkn nkr nku nnb nnc nne nng nni nnk nnn nnu nrb nrc nre nrg nri nrk nrn nrr nru nub nuc nue nug nui nuk nun nur nuu rbb rbc rbe rbg rbi rbk rbn rbr rbu rcb rcc rce rcg rci rcn rcr rcu re- reb rec ree reg rei rek ren rer reu rgb rgc rge rgg rgi rgk rgn rgr rib ric rie rig rii rik rin rir rkb rkc rke rkg rkk rku rnb rnc rng rni rnn rnr rnu rrb rrc rrg rri rrk rrn rrr rru rub ruc rue rug rui ruk run rur ruu ubb ubc ube ubg ubi ubk ubn ubr ubu ucb ucc uce ucg uci uck ucn ucr ucu ueb uec uee ueg uei uen uer ugb ugc uge ugg ugi ugk ugn ugr ugu uib uic uie uig uii uin uir uiu ukb ukc uke uki ukk ukn ukr uku un- unb unc une ung uni unk unn unr unu ur- urb urc ure urg uri urk urn urr uru uuc uue uug uun uur uuu