choom hcoom cohom ochom hocom ohcom choom hcoom cohom ochom hocom ohcom coohm ocohm coohm ocohm oochm oochm hoocm ohocm hoocm ohocm oohcm oohcm chomo hcomo cohmo ochmo hocmo ohcmo chmoo hcmoo cmhoo mchoo hmcoo mhcoo comho ocmho cmoho mcoho omcho mocho homco ohmco hmoco mhoco omhco mohco chomo hcomo cohmo ochmo hocmo ohcmo chmoo hcmoo cmhoo mchoo hmcoo mhcoo comho ocmho cmoho mcoho omcho mocho homco ohmco hmoco mhoco omhco mohco coomh ocomh coomh ocomh oocmh oocmh comoh ocmoh cmooh mcooh omcoh mocoh comoh ocmoh cmooh mcooh omcoh mocoh oomch oomch omoch mooch omoch mooch hoomc ohomc hoomc ohomc oohmc oohmc homoc ohmoc hmooc mhooc omhoc mohoc homoc ohmoc hmooc mhooc omhoc mohoc oomhc oomhc omohc moohc omohc moohc
Note: these 'words' (valid or invalid) are all the permutations of the word choom. These words are obtained by scrambling the letters in choom.