c-- ccc cco ccs cct ccu co- coc coo cos cot cou coy csc cso css cst csu csy ctc cto cts ctt ctu cty cuc cuo cus cut cuu cuy cyc cyo cys cyt oc- occ oco ocs oct ocu oo- ooc ooo oos oot os- osc oso oss ost osu ot- otc oto ots ott otu ou- ouc ouo ous out oyo oys scc sco scs sct scu soc soo sos sot sou soy ss- ssc sso sss sst ssu stc sto sts stt stu sty suc suo sus sut suu suy sy- syc sys syt syu tcc tco tcs tct tcu to- toc too tos tot tou toy tsc tso tss tst tsu tsy ttc tto tts ttt ttu tty tuc tuo tus tut tuu tuy tyc tyo tys tyt ucc uco ucs uct ucu uoc uoo uos uot usc uso uss ust usu utc uto uts utt utu uty uuc uus uut uuu uyc uyo uys uyu ycc yco ycs ycu ycy yoc yoo yos yot you yoy ysc yso yss yst ysu ysy ytc yto yts ytt ytu yuo yus yut yuu yuy yyc yys yyt yyu yyy