-up a-a a-b aaa aab aao aap aau aay ab- aba abb abo abp abu aby aoa aob aoo aop aou ap- apa apb apo app apu apy au- aua aub auo aup ay- aya ayo ayp ayu b-p b-u baa bab bao bap bau bay bba bbb bbo bbp bbu bby boa bob boo bop bou boy bpa bpb bpo bpp bpu bpy bua bub buo bup buu buy by- bya byo byp byu oaa oab oao oap oau ob- oba obb obo obp obu oby oo- ooa oob ooo oop op- opa opb opo opp opy ou- oua ouo oup oya oyo p-p paa pab pao pap pau pay pba pbb pbo pbp pbu pby poa pob poo pop pou poy ppa ppb ppo ppp ppu pua pub pup puu puy py- pya pyb pyo pyu ua- uaa uab uao uap uau uay uba ubb ubo ubp ubu uby uoa uob uoo uop up- upa upb upo upp upu uua uuu uyo uyu yaa yab yao yap yau yay ybp yby yob yoo yop you yoy ypa ypo ypu yua yuo yup yuu yuy yyb yyu yyy