-er -up a-a a-b aaa aab aae aak aan aap aar aau ab- aba abb abe abk abn abp abr abu aea aeb aee aek aen aep aer aeu aka akb ake akk akn akp akr aku an- ana anb ane ank ann anp anr anu ap- apa apb ape apk apn app apr apu ar- ara arb are ark arn arp arr aru au- aua aub aue auk aun aup aur b-p b-u baa bab bae bak ban bap bar bau bba bbb bbe bbk bbn bbp bbr bbu be- bea beb bee bek ben bep ber beu bka bkb bke bkk bkn bkp bkr bna bnb bne bnk bnn bnp bnr bnu bpa bpb bpe bpn bpp bpr bpu bra brb bre brk brn brp brr bru bua bub bue buk bun bup bur buu eaa eab eae eak ean eap ear eau eba ebb ebe ebk ebn ebp ebr ebu eea eeb eee eek een eep eer eka ekb eke ekp ekr eku en- ena enb ene enk enn enp enr enu ep- epa epb epe epn epp epr epu era erb ere erk ern erp err eru eu- eua eub eue eun eup eur ka- kaa kab kae kak kan kap kar kau kba kbb kbe kbk kbn kbp kbr kbu ke- kea keb kee kek ken kep ker kkb kke kkk kkn kkp kkr kku kn- kna kne knk knn knp knr knu kpa kpe kpk kpn kpp kpr kpu kra krk krn krp krr kru kub kue kuk kun kup kur kuu naa nab nae nak nan nap nar nau nba nbb nbe nbk nbn nbp nbr nbu ne- nea neb nee nek nen nep ner neu nka nke nkk nkn nkp nkr nku nna nnb nne nnk nnn nnp nnu npa npb npe npn npp npr npu nra nrb nre nrk nrn nrp nrr nru nua nub nue nuk nun nup nur nuu p-p paa pab pae pak pan pap par pau pba pbb pbe pbk pbn pbp pbr pbu pea peb pee pek pen pep per peu pka pkb pke pkn pkp pkr pku pn- pna pnb pne pnk pnn pnp pnr pnu ppa ppb ppe ppk ppn ppp ppr ppu pra prb pre prk prn prp prr pru pua pub pue puk pun pup pur puu ra- raa rab rae rak ran rap rar rau rba rbb rbe rbk rbn rbp rbr rbu re- rea reb ree rek ren rep rer reu rkb rke rkk rkp rku rna rnb rnn rnp rnr rnu rpa rpb rpe rpk rpn rpp rpr rpu rra rrb rrk rrn rrp rrr rru rua rub rue ruk run rup rur ruu ua- uaa uab uae uak uan uap uar uau uba ubb ube ubk ubn ubp ubr ubu uea ueb uee uen uep uer uka ukb uke ukk ukn ukp ukr uku un- una unb une unk unn unp unr unu up- upa upb upe upk upn upp upr upu ur- ura urb ure urk urn urp urr uru uua uue uun uur uuu