-up a-a a-b aaa aab aan aap aar aau ab- aba abb abn abp abr abu an- ana anb ann anp anr anu ap- apa apb apn app apr apu ar- ara arb arn arp arr aru au- aua aub aun aup aur b-p b-u baa bab ban bap bar bau bba bbb bbn bbp bbr bbu bna bnb bnn bnp bnr bnu bpa bpb bpn bpp bpr bpu bra brb brn brp brr bru bua bub bun bup bur buu naa nab nan nap nar nau nba nbb nbn nbp nbr nbu nna nnb nnn nnp nnu npa npb npn npp npr npu nra nrb nrn nrp nrr nru nua nub nun nup nur nuu p-p paa pab pan pap par pau pba pbb pbn pbp pbr pbu pn- pna pnb pnn pnp pnr pnu ppa ppb ppn ppp ppr ppu pra prb prn prp prr pru pua pub pun pup pur puu ra- raa rab ran rap rar rau rba rbb rbn rbp rbr rbu rna rnb rnn rnp rnr rnu rpa rpb rpn rpp rpr rpu rra rrb rrn rrp rrr rru rua rub run rup rur ruu ua- uaa uab uan uap uar uau uba ubb ubn ubp ubr ubu un- una unb unn unp unr unu up- upa upb upn upp upr upu ur- ura urb urn urp urr uru uua uun uur uuu