-er -up b-p b-u bbb bbe bbg bbo bbp bbr bbt bbu be- beb bee beg beo bep ber bet beu bgb bge bgg bgo bgp bgr bgt bgu bob boe bog boo bop bor bot bou bpb bpe bpg bpo bpp bpr bpt bpu brb bre brg bro brp brr brt bru btb bte btg bto btp btr btt btu bub bue bug buo bup bur but buu ebb ebe ebg ebo ebp ebr ebt ebu eeb eee eeg eeo eep eer eet egb ege egg ego egp egr egt egu eo- eob eoe eog eoo eop eor eot eou ep- epb epe epg epo epp epr ept epu erb ere erg ero erp err ert eru etb ete etg eto etp etr ett etu eu- eub eue eug eup eur eut g-p gbe gbg gbo gbp gbr gbt gbu ge- geb gee geg geo gep ger get geu ggb ggg ggo ggp ggr ggt ggu gob goe gog goo gop gor got gou gpb gpe gpg gpo gpp gpr gpt gpu grb gre grg gro grp grr grt gru gtb gte gtg gto gtp gtr gtt gtu gu- gub gue gug guo gup gur gut guu ob- obb obe obg obo obp obr obt obu oeb oee oeg oeo oep oer oet oge ogg ogo ogp ogt oo- oob oog ooo oop oor oot op- opb ope opg opo opp opr opt or- orb ore org oro orp orr ort oru ot- otb ote otg oto otp otr ott otu ou- oue ouo oup our out p-p pbb pbe pbg pbo pbp pbr pbt pbu peb pee peg peo pep per pet peu pgb pge pgg pgo pgp pgr pgt pob poe pog poo pop por pot pou ppb ppe ppg ppo ppp ppr ppt ppu prb pre prg pro prp prr prt pru pt- ptb pte ptg pto ptp ptr ptt ptu pub pue pug pup pur put puu rbb rbe rbg rbo rbp rbr rbt rbu re- reb ree reg reo rep rer ret reu rgb rge rgg rgo rgp rgr rgt rob roe rog roo rop ror rot rou rpb rpe rpg rpo rpp rpr rpt rpu rrb rrg rrp rrr rrt rru rtb rte rtg rto rtp rtr rtt rtu rub rue rug ruo rup rur rut ruu tbb tbe tbg tbo tbp tbr tbt tbu te- teb tee teg teo tep ter tet teu tgb tge tgg tgo tgp tgr tgt tgu to- tob toe tog too top tor tot tou tpb tpe tpg tpo tpp tpr tpt tpu trb tre trg tro trp trr trt tru ttb tte ttg tto ttp ttr ttt ttu tub tue tug tuo tup tur tut tuu ubb ube ubg ubo ubp ubr ubt ubu ueb uee ueg uep uer uet ugb uge ugg ugo ugp ugr ugt ugu uob uoe uog uoo uop uor uot up- upb upe upg upo upp upr upt upu ur- urb ure urg uro urp urr urt uru utb ute uto utp utr utt utu uue uug uur uut uuu