c-- ccc cco ccs ccu co- coc coo cos cou coy csc cso css csu csy cuc cuo cus cuu cuy cyc cyo cys oc- occ oco ocs ocu oo- ooc ooo oos os- osc oso oss osu ou- ouc ouo ous oyo oys scc sco scs scu soc soo sos sou soy ss- ssc sso sss ssu suc suo sus suu suy sy- syc sys syu ucc uco ucs ucu uoc uoo uos usc uso uss usu uuc uus uuu uyc uyo uys uyu ycc yco ycs ycu ycy yoc yoo yos you yoy ysc yso yss ysu ysy yuo yus yuu yuy yyc yys yyu yyy