-up c-- ccc ccf cco ccp ccs cct ccu cfc cff cfo cfp cfs cft cfu co- coc cof coo cop cos cot cou cpc cpf cpo cpp cps cpt cpu csc csf cso csp css cst csu ctc ctf cto ctp cts ctt ctu cuc cuf cuo cup cus cut cuu fcc fcf fco fcp fcs fct fcu ffc fff ffo ffp ffs fft ffu foc fof foo fop fos fot fou fpc fpo fpp fps fpt fpu fsc fsf fso fsp fss fst fsu ftc ftf fto ftp fts ftt ftu fuf fuo fup fus fut fuu oc- occ ocf oco ocp ocs oct ocu of- ofc off ofo ofp ofs oft ofu oo- ooc oof ooo oop oos oot op- opc opf opo opp ops opt os- osc osf oso osp oss ost osu ot- otc otf oto otp ots ott otu ou- ouc ouf ouo oup ous out p-p pcc pcf pco pcp pcs pct pcu pfc pff pfo pfp pfs pft pfu poc pof poo pop pos pot pou ppc ppf ppo ppp pps ppt ppu ps- psc psf pso psp pss pst psu pt- ptc ptf pto ptp pts ptt ptu puc puf pup pus put puu scc scf sco scp scs sct scu sfc sff sfo sfp sfs sft sfu soc sof soo sop sos sot sou spc spf spo spp sps spt spu ss- ssc ssf sso ssp sss sst ssu stc stf sto stp sts stt stu suc suf suo sup sus sut suu tcc tcf tco tcp tcs tct tcu tfc tff tfo tfp tfs tft tfu to- toc tof too top tos tot tou tpc tpf tpo tpp tps tpt tpu tsc tsf tso tsp tss tst tsu ttc ttf tto ttp tts ttt ttu tuc tuf tuo tup tus tut tuu ucc ucf uco ucp ucs uct ucu ufc uff ufo ufp ufs uft ufu uoc uoo uop uos uot up- upc upf upo upp ups upt upu usc usf uso usp uss ust usu utc utf uto utp uts utt utu uuc uus uut uuu