-er -up a-a a-b aaa aab aae aaf aao aap aar aau ab- aba abb abe abf abo abp abr abu aea aeb aee aef aeo aep aer aeu af- afa afb afe aff afo afp afr afu aoa aob aoe aof aoo aop aor aou ap- apa apb ape apf apo app apr apu ar- ara arb are arf aro arp arr aru au- aua aub aue auf auo aup aur b-p b-u baa bab bae baf bao bap bar bau bba bbb bbe bbf bbo bbp bbr bbu be- bea beb bee bef beo bep ber beu bfa bfb bfe bff bfo bfp bfr bfu boa bob boe bof boo bop bor bou bpa bpb bpe bpf bpo bpp bpr bpu bra brb bre brf bro brp brr bru bua bub bue buf buo bup bur buu eaa eab eae eaf eao eap ear eau eba ebb ebe ebf ebo ebp ebr ebu eea eeb eee eef eeo eep eer ef- efa efb efe eff efo efp efr eo- eoa eob eoe eof eoo eop eor eou ep- epa epb epe epf epo epp epr epu era erb ere erf ero erp err eru eu- eua eub eue euf eup eur faa fab fae faf fao fap far fau fba fbb fbe fbf fbo fbp fbr fbu fea feb fee fef feo fep fer feu ffa ffe fff ffo ffp ffr ffu foa fob foe fof foo fop for fou fpa fpb fpe fpo fpp fpr fpu fra frb fre frf fro frp frr fru fua fub fue fuf fuo fup fur fuu oaa oab oae oaf oao oap oar oau ob- oba obb obe obf obo obp obr obu oea oeb oee oef oeo oep oer of- ofa ofb ofe off ofo ofp ofr ofu oo- ooa oob oof ooo oop oor op- opa opb ope opf opo opp opr or- ora orb ore orf oro orp orr oru ou- oua oue ouf ouo oup our p-p paa pab pae paf pao pap par pau pba pbb pbe pbf pbo pbp pbr pbu pea peb pee pef peo pep per peu pfa pfb pfe pff pfo pfp pfr pfu poa pob poe pof poo pop por pou ppa ppb ppe ppf ppo ppp ppr ppu pra prb pre prf pro prp prr pru pua pub pue puf pup pur puu ra- raa rab rae raf rao rap rar rau rba rbb rbe rbf rbo rbp rbr rbu re- rea reb ree ref reo rep rer reu rfa rfb rfe rff rfo rfp rfr rfu roa rob roe rof roo rop ror rou rpa rpb rpe rpf rpo rpp rpr rpu rra rrb rrf rrp rrr rru rua rub rue ruf ruo rup rur ruu ua- uaa uab uae uaf uao uap uar uau uba ubb ube ubf ubo ubp ubr ubu uea ueb uee uef uep uer ufa ufe uff ufo ufp ufr ufu uoa uob uoe uoo uop uor up- upa upb upe upf upo upp upr upu ur- ura urb ure urf uro urp urr uru uua uue uur uuu