-er -up a-a a-b aaa aab aae aak aap aar aau ab- aba abb abe abk abp abr abu aea aeb aee aek aep aer aeu aka akb ake akk akp akr aku ap- apa apb ape apk app apr apu ar- ara arb are ark arp arr aru au- aua aub aue auk aup aur b-p b-u baa bab bae bak bap bar bau bba bbb bbe bbk bbp bbr bbu be- bea beb bee bek bep ber beu bka bkb bke bkk bkp bkr bpa bpb bpe bpp bpr bpu bra brb bre brk brp brr bru bua bub bue buk bup bur buu eaa eab eae eak eap ear eau eba ebb ebe ebk ebp ebr ebu eea eeb eee eek eep eer eka ekb eke ekp ekr eku ep- epa epb epe epp epr epu era erb ere erk erp err eru eu- eua eub eue eup eur ka- kaa kab kae kak kap kar kau kba kbb kbe kbk kbp kbr kbu ke- kea keb kee kek kep ker kkb kke kkk kkp kkr kku kpa kpe kpk kpp kpr kpu kra krk krp krr kru kub kue kuk kup kur kuu p-p paa pab pae pak pap par pau pba pbb pbe pbk pbp pbr pbu pea peb pee pek pep per peu pka pkb pke pkp pkr pku ppa ppb ppe ppk ppp ppr ppu pra prb pre prk prp prr pru pua pub pue puk pup pur puu ra- raa rab rae rak rap rar rau rba rbb rbe rbk rbp rbr rbu re- rea reb ree rek rep rer reu rkb rke rkk rkp rku rpa rpb rpe rpk rpp rpr rpu rra rrb rrk rrp rrr rru rua rub rue ruk rup rur ruu ua- uaa uab uae uak uap uar uau uba ubb ube ubk ubp ubr ubu uea ueb uee uep uer uka ukb uke ukk ukp ukr uku up- upa upb upe upk upp upr upu ur- ura urb ure urk urp urr uru uua uue uur uuu