cooth ocoth cooth ocoth oocth oocth cotoh octoh ctooh tcooh otcoh tocoh cotoh octoh ctooh tcooh otcoh tocoh ootch ootch otoch tooch otoch tooch cooht ocoht cooht ocoht oocht oocht cohot ochot choot hcoot ohcot hocot cohot ochot choot hcoot ohcot hocot oohct oohct ohoct hooct ohoct hooct cotho octho ctoho tcoho otcho tocho cohto ochto choto hcoto ohcto hocto cthoo tchoo chtoo hctoo thcoo htcoo othco tohco ohtco hotco thoco htoco cotho octho ctoho tcoho otcho tocho cohto ochto choto hcoto ohcto hocto cthoo tchoo chtoo hctoo thcoo htcoo othco tohco ohtco hotco thoco htoco oothc oothc otohc toohc otohc toohc oohtc oohtc ohotc hootc ohotc hootc othoc tohoc ohtoc hotoc thooc htooc othoc tohoc ohtoc hotoc thooc htooc
Note: these 'words' (valid or invalid) are all the permutations of the word cooth. These words are obtained by scrambling the letters in cooth.