-up b-p b-u bbb bbc bbo bbp bbs bbt bbu bby bcb bcc bco bcp bcs bct bcu bcy bob boc boo bop bos bot bou boy bpb bpc bpo bpp bps bpt bpu bpy bsb bsc bso bsp bss bst bsu bsy btb btc bto btp bts btt btu bty bub buc buo bup bus but buu buy by- byc byo byp bys byt byu c-- cbb cbc cbo cbp cbs cbt cbu cby ccb ccc cco ccp ccs cct ccu co- cob coc coo cop cos cot cou coy cpb cpc cpo cpp cps cpt cpu csb csc cso csp css cst csu csy ctb ctc cto ctp cts ctt ctu cty cub cuc cuo cup cus cut cuu cuy cyb cyc cyo cyp cys cyt ob- obb obc obo obp obs obt obu oby oc- ocb occ oco ocp ocs oct ocu oo- oob ooc ooo oop oos oot op- opb opc opo opp ops opt opy os- osb osc oso osp oss ost osu ot- otb otc oto otp ots ott otu ou- ouc ouo oup ous out oyo oys p-p pbb pbc pbo pbp pbs pbt pbu pby pcb pcc pco pcp pcs pct pcu pob poc poo pop pos pot pou poy ppb ppc ppo ppp pps ppt ppu ps- psb psc pso psp pss pst psu psy pt- ptb ptc pto ptp pts ptt ptu pty pub puc pup pus put puu puy py- pyb pyc pyo pys pyt pyu sbb sbc sbo sbp sbs sbt sbu sby scb scc sco scp scs sct scu sob soc soo sop sos sot sou soy spb spc spo spp sps spt spu spy ss- ssb ssc sso ssp sss sst ssu stb stc sto stp sts stt stu sty sub suc suo sup sus sut suu suy sy- syb syc syp sys syt syu tbb tbc tbo tbp tbs tbt tbu tcb tcc tco tcp tcs tct tcu to- tob toc too top tos tot tou toy tpb tpc tpo tpp tps tpt tpu tsb tsc tso tsp tss tst tsu tsy ttb ttc tto ttp tts ttt ttu tty tub tuc tuo tup tus tut tuu tuy tyc tyo typ tys tyt ubb ubc ubo ubp ubs ubt ubu uby ucb ucc uco ucp ucs uct ucu uob uoc uoo uop uos uot up- upb upc upo upp ups upt upu usb usc uso usp uss ust usu utb utc uto utp uts utt utu uty uuc uus uut uuu uyc uyo uys uyu ybc ybp ybs yby ycc yco ycp ycs ycu ycy yob yoc yoo yop yos yot you yoy ypo yps ypu ysb ysc yso ysp yss yst ysu ysy ytc yto ytp yts ytt ytu yuo yup yus yut yuu yuy yyb yyc yys yyt yyu yyy