-er -ic b-u bbb bbc bbe bbg bbh bbi bbr bbu bcb bcc bce bcg bch bci bcr bcu be- beb bec bee beg beh bei ber beu bgb bgc bge bgg bgh bgi bgr bgu bhb bhc bhe bhg bhh bhi bhr bhu bi- bib bic bie big bih bii bir biu brb bre brg brh bri brr bru bub buc bue bug buh bui bur buu c-- cbb cbc cbe cbg cbh cbi cbr cbu ccb ccc cce ccg cch cci ccr ccu ce- ceb cec cee ceg ceh cei cer ceu cgb cgc cge cgg cgh cgi cgr cgu ch- chb chc che chg chh chi chr chu ci- cib cic cie cig cih cii cir ciu crb crc cre crg crh cri crr cru cub cuc cue cug cuh cui cur cuu ebb ebc ebe ebg ebh ebi ebr ebu ec- ecb ecc ece ecg ech eci ecr ecu eeb eec eee eeg eer egb egc ege egg egh egi egr egu ehb ehc ehe ehg ehh ehi ehr ehu eib eic eie eig eii eir eiu erb erc ere erg erh eri err eru eu- eub euc eue eug eui eur gbc gbe gbg gbh gbi gbr gbu gcb gcc gce gcg gch gci gcr gcu ge- geb gec gee geg geh gei ger geu ggb ggc ggg ggh ggi ggr ggu ghb ghc ghe ghg ghh ghi ghr gib gic gie gig gih gii gir giu grb grc gre grg grh gri grr gru gu- gub guc gue gug gui gur guu h-i hbb hbc hbe hbg hbh hbi hbr hbu hcb hcc hce hcg hch hci hcr he- heb hec hee heg heh hei her heu hgb hgc hge hgg hgh hgi hgr hgu hhb hhc hhe hhg hhh hhi hhr hhu hib hic hie hig hih hii hir hiu hr- hrb hrc hre hrg hrh hri hrr hru hub huc hue hug huh hui hur huu ibb ibc ibe ibg ibh ibi ibr ibu icb icc ice icg ich ici icr icu ie- iec iee ieg iei ier igb igc ige igg igh igi igr igu ihb ihc ihe ihg ihh ihi ihr ihu iib iic iie iih iii iir iiu ir- irb irc ire irg iri irr iru iu- iub iuc iue iug iui iur rbb rbc rbe rbg rbh rbi rbr rbu rcb rcc rce rcg rch rci rcr rcu re- reb rec ree reg reh rei rer reu rgb rgc rge rgg rgh rgi rgr rh- rhb rhc rhe rhg rhh rhi rhr rhu rib ric rie rig rih rii rir rrb rrc rrg rrh rri rrr rru rub ruc rue rug ruh rui rur ruu ubb ubc ube ubg ubh ubi ubr ubu ucb ucc uce ucg uch uci ucr ucu ueb uec uee ueg ueh uei uer ugb ugc uge ugg ugh ugi ugr ugu uhb uhc uhe uhh uhi uhr uhu uib uic uie uig uii uir uiu ur- urb urc ure urg uri urr uru uuc uue uug uur uuu