-up a-a a-b aaa aab aao aap aar aau aav ab- aba abb abo abp abr abu abv aoa aob aoo aop aor aou aov ap- apa apb apo app apr apu apv ar- ara arb aro arp arr aru arv au- aua aub auo aup aur auv av- ava avb avo avp avr avu b-p b-u baa bab bao bap bar bau bav bba bbb bbo bbp bbr bbu boa bob boo bop bor bou bov bpa bpb bpo bpp bpr bpu bpv bra brb bro brp brr bru brv bua bub buo bup bur buu bva bvb bvo bvp bvr bvu bvv oaa oab oao oap oar oau oav ob- oba obb obo obp obr obu obv oo- ooa oob ooo oop oor oov op- opa opb opo opp opr opv or- ora orb oro orp orr oru orv ou- oua ouo oup our ov- ova ovb ovo ovp ovv p-p paa pab pao pap par pau pav pba pbb pbo pbp pbr pbu poa pob poo pop por pou pov ppa ppb ppo ppp ppr ppu ppv pra prb pro prp prr pru prv pua pub pup pur puu pva pvb pvo pvp pvr pvu pvv ra- raa rab rao rap rar rau rav rba rbb rbo rbp rbr rbu roa rob roo rop ror rou rov rpa rpb rpo rpp rpr rpu rpv rra rrb rrp rrr rru rua rub ruo rup rur ruu ruv rva rvb rvo rvp rvr rvu rvv ua- uaa uab uao uap uar uau uav uba ubb ubo ubp ubr ubu ubv uoa uob uoo uop uor up- upa upb upo upp upr upu upv ur- ura urb uro urp urr uru uua uur uuu uva uvb uvo uvu uvv v-a vaa vab vao vap var vau vav vba vbo vbr vbv voa vob voo vop vor vou vov vpa vpb vpo vpp vpr vpu vra vrb vrp vrr vru vup vur vuv vva vvb vvo vvr vvv