-up b-p b-u bbb bbc bbd bbo bbp bbu bby bcb bcc bcd bco bcp bcu bcy bdb bdc bdd bdo bdp bdu bdy bob boc bod boo bop bou boy bpb bpc bpd bpo bpp bpu bpy bub buc bud buo bup buu buy by- byc byd byo byp byu c-- cbb cbc cbd cbo cbp cbu cby ccb ccc ccd cco ccp ccu cdb cdc cdd cdo cdp cdu cdy co- cob coc cod coo cop cou coy cpb cpc cpd cpo cpp cpu cub cuc cud cuo cup cuu cuy cyb cyc cyd cyo cyp dbb dbc dbd dbo dbp dbu dby dcb dcc dcd dco dcp dcu ddb ddc ddd ddo ddp ddu ddy dob doc dod doo dop dou doy dpb dpc dpd dpo dpp dpu dub duc dud duo dup duy dy- dyb dyc dyd dyo dyp dyu dyy ob- obb obc obd obo obp obu oby oc- ocb occ ocd oco ocp ocu odb odc odd odo odp odu oo- oob ooc ood ooo oop op- opb opc opd opo opp opy ou- ouc oud ouo oup oyd oyo p-p pbb pbc pbd pbo pbp pbu pby pcb pcc pcd pco pcp pcu pdb pdc pdd pdo pdp pdu pob poc pod poo pop pou poy ppb ppc ppd ppo ppp ppu pub puc pud pup puu puy py- pyb pyc pyd pyo pyu ubb ubc ubo ubp ubu uby ucb ucc ucd uco ucp ucu udb udc udd udo udp udu uob uoc uod uoo uop up- upb upc upd upo upp upu uuc uuu uyc uyo uyu ybc ybp yby ycc ycd yco ycp ycu ycy ydo ydy yob yoc yod yoo yop you yoy ypd ypo ypu yud yuo yup yuu yuy yyb yyc yyu yyy