-er -up b-p b-u bbb bbc bbe bbg bbh bbp bbr bbu bcb bcc bce bcg bch bcp bcr bcu be- beb bec bee beg beh bep ber beu bgb bgc bge bgg bgh bgp bgr bgu bhb bhc bhe bhg bhh bhp bhr bhu bpb bpc bpe bpg bph bpp bpr bpu brb bre brg brh brp brr bru bub buc bue bug buh bup bur buu c-- cbb cbc cbe cbg cbh cbp cbr cbu ccb ccc cce ccg cch ccp ccr ccu ce- ceb cec cee ceg ceh cep cer ceu cgb cgc cge cgg cgh cgp cgr cgu ch- chb chc che chg chh chp chr chu cpb cpc cpe cpg cph cpp cpr cpu crb crc cre crg crh crp crr cru cub cuc cue cug cuh cup cur cuu ebb ebc ebe ebg ebh ebp ebr ebu ec- ecb ecc ece ecg ech ecr ecu eeb eec eee eeg eep eer egb egc ege egg egh egp egr egu ehb ehc ehe ehg ehh ehp ehr ehu ep- epb epc epe epg eph epp epr epu erb erc ere erg erh erp err eru eu- eub euc eue eug eup eur g-p gbc gbe gbg gbh gbp gbr gbu gcb gcc gce gcg gch gcp gcr gcu ge- geb gec gee geg geh gep ger geu ggb ggc ggg ggh ggp ggr ggu ghb ghc ghe ghg ghh ghp ghr gpb gpc gpe gpg gph gpp gpr gpu grb grc gre grg grh grp grr gru gu- gub guc gue gug gup gur guu hbb hbc hbe hbg hbh hbp hbr hbu hcb hcc hce hcg hch hcp hcr he- heb hec hee heg heh hep her heu hgb hgc hge hgg hgh hgp hgr hgu hhb hhc hhe hhg hhh hhp hhr hhu hpb hpc hpe hpg hph hpp hpr hpu hr- hrb hrc hre hrg hrh hrp hrr hru hub huc hue hug huh hup hur huu p-p pbb pbc pbe pbg pbp pbr pbu pcb pcc pce pcg pch pcp pcr pcu peb pec pee peg peh pep per peu pgb pgc pge pgg pgh pgp pgr phb phc phe phg php phr phu ppb ppc ppe ppg pph ppp ppr ppu prb prc pre prg prh prp prr pru pub puc pue pug puh pup pur puu rbb rbc rbe rbg rbh rbp rbr rbu rcb rcc rce rcg rch rcp rcr rcu re- reb rec ree reg reh rep rer reu rgb rgc rge rgg rgh rgp rgr rh- rhb rhc rhe rhg rhh rhp rhr rhu rpb rpc rpe rpg rph rpp rpr rpu rrb rrc rrg rrh rrp rrr rru rub ruc rue rug ruh rup rur ruu ubb ubc ube ubg ubh ubp ubr ubu ucb ucc uce ucg uch ucp ucr ucu ueb uec uee ueg ueh uep uer ugb ugc uge ugg ugh ugp ugr ugu uhb uhc uhe uhh uhp uhr uhu up- upb upc upe upg uph upp upr upu ur- urb urc ure urg urp urr uru uuc uue uug uur uuu