-er -up a-a a-b aaa aab aae aak aao aap aar aau ab- aba abb abe abk abo abp abr abu aea aeb aee aek aeo aep aer aeu aka akb ake akk ako akp akr aku aoa aob aoe aok aoo aop aor aou ap- apa apb ape apk apo app apr apu ar- ara arb are ark aro arp arr aru au- aua aub aue auk auo aup aur b-p b-u baa bab bae bak bao bap bar bau bba bbb bbe bbk bbo bbp bbr bbu be- bea beb bee bek beo bep ber beu bka bkb bke bkk bko bkp bkr boa bob boe bok boo bop bor bou bpa bpb bpe bpo bpp bpr bpu bra brb bre brk bro brp brr bru bua bub bue buk buo bup bur buu eaa eab eae eak eao eap ear eau eba ebb ebe ebk ebo ebp ebr ebu eea eeb eee eek eeo eep eer eka ekb eke eko ekp ekr eku eo- eoa eob eoe eok eoo eop eor eou ep- epa epb epe epo epp epr epu era erb ere erk ero erp err eru eu- eua eub eue eup eur ka- kaa kab kae kak kao kap kar kau kba kbb kbe kbk kbo kbp kbr kbu ke- kea keb kee kek keo kep ker kkb kke kkk kkp kkr kku koa kob koe kok koo kop kor kou kpa kpe kpk kpo kpp kpr kpu kra krk kro krp krr kru kub kue kuk kup kur kuu oaa oab oae oak oao oap oar oau ob- oba obb obe obk obo obp obr obu oea oeb oee oeo oep oer oka okb oke okk oko okp okr oku oo- ooa oob ook ooo oop oor op- opa opb ope opk opo opp opr or- ora orb ore ork oro orp orr oru ou- oua oue ouk ouo oup our p-p paa pab pae pak pao pap par pau pba pbb pbe pbk pbo pbp pbr pbu pea peb pee pek peo pep per peu pka pkb pke pko pkp pkr pku poa pob poe pok poo pop por pou ppa ppb ppe ppk ppo ppp ppr ppu pra prb pre prk pro prp prr pru pua pub pue puk pup pur puu ra- raa rab rae rak rao rap rar rau rba rbb rbe rbk rbo rbp rbr rbu re- rea reb ree rek reo rep rer reu rkb rke rkk rko rkp rku roa rob roe rok roo rop ror rou rpa rpb rpe rpk rpo rpp rpr rpu rra rrb rrk rrp rrr rru rua rub rue ruk ruo rup rur ruu ua- uaa uab uae uak uao uap uar uau uba ubb ube ubk ubo ubp ubr ubu uea ueb uee uep uer uka ukb uke ukk ukp ukr uku uoa uob uoe uok uoo uop uor up- upa upb upe upk upo upp upr upu ur- ura urb ure urk uro urp urr uru uua uue uur uuu