c-- ccc cch cco ccu ccx ch- chc chh cho chu chx chy co- coc coh coo cou cox coy cuc cuh cuo cuu cuy cxc cxh cxo cxx cyc cyo hcc hch hco hcy hhc hhh hho hhu hhy hoc hoh hoo hou hox hoy huc huh huo huu hux huy hxc hy- hyc hyh hyo hyy oc- occ och oco ocu ocx ohc ohh oho ohu oo- ooc ooh ooo oox ou- ouc ouh ouo ox- oxc oxo oxx oxy oyo ucc uch uco ucu uhc uhh uho uhu uhy uoc uoo uox uuc uuu uxc uxo uxu uyc uyo uyu xch xcx xoc xoo xox xxo xxx xxy xyy ycc ych yco ycu ycy yhc yhu yoc yoo you yox yoy yuh yuo yuu yux yuy yxy yyc yyu yyy