-up c-- ccc ccp ccs cct ccu cpc cpp cps cpt cpu csc csp css cst csu ctc ctp cts ctt ctu cuc cup cus cut cuu p-p pcc pcp pcs pct pcu ppc ppp pps ppt ppu ps- psc psp pss pst psu pt- ptc ptp pts ptt ptu puc pup pus put puu scc scp scs sct scu spc spp sps spt spu ss- ssc ssp sss sst ssu stc stp sts stt stu suc sup sus sut suu tcc tcp tcs tct tcu tpc tpp tps tpt tpu tsc tsp tss tst tsu ttc ttp tts ttt ttu tuc tup tus tut tuu ucc ucp ucs uct ucu up- upc upp ups upt upu usc usp uss ust usu utc utp uts utt utu uuc uus uut uuu