-er -ic b-u bbb bbc bbe bbg bbh bbi bbk bbr bbu bcb bcc bce bcg bch bci bck bcr bcu be- beb bec bee beg beh bei bek ber beu bgb bgc bge bgg bgh bgi bgk bgr bgu bhb bhc bhe bhg bhh bhi bhk bhr bhu bi- bib bic bie big bih bii bik bir biu bkb bkc bke bkg bkk bkr brb bre brg brh bri brk brr bru bub buc bue bug buh bui buk bur buu c-- cbb cbc cbe cbg cbh cbi cbk cbr cbu ccb ccc cce ccg cch cci cck ccr ccu ce- ceb cec cee ceg ceh cei cek cer ceu cgb cgc cge cgg cgh cgi cgr cgu ch- chb chc che chg chh chi chk chr chu ci- cib cic cie cig cih cii cik cir ciu ckb ckc ckh cki crb crc cre crg crh cri crk crr cru cub cuc cue cug cuh cui cuk cur cuu ebb ebc ebe ebg ebh ebi ebk ebr ebu ec- ecb ecc ece ecg ech eci eck ecr ecu eeb eec eee eeg eek eer egb egc ege egg egh egi egr egu ehb ehc ehe ehg ehh ehi ehr ehu eib eic eie eig eii eik eir eiu ekb ekc eke ekg ekh eki ekr eku erb erc ere erg erh eri erk err eru eu- eub euc eue eug eui eur gbc gbe gbg gbh gbi gbk gbr gbu gcb gcc gce gcg gch gci gck gcr gcu ge- geb gec gee geg geh gei gek ger geu ggb ggc ggg ggh ggi ggr ggu ghb ghc ghe ghg ghh ghi ghr gib gic gie gig gih gii gik gir giu gkb gkh grb grc gre grg grh gri grk grr gru gu- gub guc gue gug gui guk gur guu h-i hbb hbc hbe hbg hbh hbi hbk hbr hbu hcb hcc hce hcg hch hci hck hcr he- heb hec hee heg heh hei hek her heu hgb hgc hge hgg hgh hgi hgk hgr hgu hhb hhc hhe hhg hhh hhi hhk hhr hhu hib hic hie hig hih hii hik hir hiu hkb hkg hkh hki hkk hkr hku hr- hrb hrc hre hrg hrh hri hrk hrr hru hub huc hue hug huh hui huk hur huu ibb ibc ibe ibg ibh ibi ibk ibr ibu icb icc ice icg ich ici ick icr icu ie- iec iee ieg iei iek ier igb igc ige igg igh igi igk igr igu ihb ihc ihe ihg ihh ihi ihk ihr ihu iib iic iie iih iii iir iiu ikb ikc ike iki ikk ikr iku ir- irb irc ire irg iri irk irr iru iu- iub iuc iue iug iui iur kbb kbc kbe kbh kbi kbk kbr kbu kcb kcc kce kcg kch kci kck kcr kcu ke- keb kec kee keg keh kei kek ker kgb kgc kgh kgi kgu khe khh khi khk khr khu kib kic kie kig kih kii kik kir kiu kkb kkc kke kkh kki kkk kkr kku krc krg kri krk krr kru kub kuc kue kug kuh kui kuk kur kuu rbb rbc rbe rbg rbh rbi rbk rbr rbu rcb rcc rce rcg rch rci rcr rcu re- reb rec ree reg reh rei rek rer reu rgb rgc rge rgg rgh rgi rgk rgr rh- rhb rhc rhe rhg rhh rhi rhr rhu rib ric rie rig rih rii rik rir rkb rkc rke rkg rkk rku rrb rrc rrg rrh rri rrk rrr rru rub ruc rue rug ruh rui ruk rur ruu ubb ubc ube ubg ubh ubi ubk ubr ubu ucb ucc uce ucg uch uci uck ucr ucu ueb uec uee ueg ueh uei uer ugb ugc uge ugg ugh ugi ugk ugr ugu uhb uhc uhe uhh uhi uhr uhu uib uic uie uig uii uir uiu ukb ukc uke uki ukk ukr uku ur- urb urc ure urg uri urk urr uru uuc uue uug uur uuu