-er -up a-a a-b aaa aab aae aan aao aap aar aau ab- aba abb abe abn abo abp abr abu aea aeb aee aen aeo aep aer aeu an- ana anb ane ann ano anp anr anu aoa aob aoe aon aoo aop aor aou ap- apa apb ape apn apo app apr apu ar- ara arb are arn aro arp arr aru au- aua aub aue aun auo aup aur b-p b-u baa bab bae ban bao bap bar bau bba bbb bbe bbn bbo bbp bbr bbu be- bea beb bee ben beo bep ber beu bna bnb bne bnn bno bnp bnr bnu boa bob boe bon boo bop bor bou bpa bpb bpe bpn bpo bpp bpr bpu bra brb bre brn bro brp brr bru bua bub bue bun buo bup bur buu eaa eab eae ean eao eap ear eau eba ebb ebe ebn ebo ebp ebr ebu eea eeb eee een eeo eep eer en- ena enb ene enn eno enp enr enu eo- eoa eob eoe eon eoo eop eor eou ep- epa epb epe epn epo epp epr epu era erb ere ern ero erp err eru eu- eua eub eue eun eup eur naa nab nae nan nao nap nar nau nba nbb nbe nbn nbo nbp nbr nbu ne- nea neb nee nen neo nep ner neu nna nnb nne nnn nno nnp nnu no- noa nob noe non noo nop nor nou npa npb npe npn npo npp npr npu nra nrb nre nrn nro nrp nrr nru nua nub nue nun nuo nup nur nuu oaa oab oae oan oao oap oar oau ob- oba obb obe obn obo obp obr obu oea oeb oee oen oeo oep oer on- ona onb one onn ono onp onr onu oo- ooa oob oon ooo oop oor op- opa opb ope opn opo opp opr or- ora orb ore orn oro orp orr oru ou- oua oue oun ouo oup our p-p paa pab pae pan pao pap par pau pba pbb pbe pbn pbo pbp pbr pbu pea peb pee pen peo pep per peu pn- pna pnb pne pnn pno pnp pnr pnu poa pob poe pon poo pop por pou ppa ppb ppe ppn ppo ppp ppr ppu pra prb pre prn pro prp prr pru pua pub pue pun pup pur puu ra- raa rab rae ran rao rap rar rau rba rbb rbe rbn rbo rbp rbr rbu re- rea reb ree ren reo rep rer reu rna rnb rnn rno rnp rnr rnu roa rob roe ron roo rop ror rou rpa rpb rpe rpn rpo rpp rpr rpu rra rrb rrn rrp rrr rru rua rub rue run ruo rup rur ruu ua- uaa uab uae uan uao uap uar uau uba ubb ube ubn ubo ubp ubr ubu uea ueb uee uen uep uer un- una unb une unn uno unp unr unu uoa uob uoe uon uoo uop uor up- upa upb upe upn upo upp upr upu ur- ura urb ure urn uro urp urr uru uua uue uun uur uuu