gthof tghof ghtof hgtof thgof htgof gtohf tgohf gothf ogthf toghf otghf ghotf hgotf gohtf oghtf hogtf ohgtf thogf htogf tohgf othgf hotgf ohtgf gthfo tghfo ghtfo hgtfo thgfo htgfo gtfho tgfho gftho fgtho tfgho ftgho ghfto hgfto gfhto fghto hfgto fhgto thfgo htfgo tfhgo fthgo hftgo fhtgo gtofh tgofh gotfh ogtfh togfh otgfh gtfoh tgfoh gftoh fgtoh tfgoh ftgoh gofth ogfth gfoth fgoth ofgth fogth tofgh otfgh tfogh ftogh oftgh fotgh ghoft hgoft gohft oghft hogft ohgft ghfot hgfot gfhot fghot hfgot fhgot gofht ogfht gfoht fgoht ofght foght hofgt ohfgt hfogt fhogt ofhgt fohgt thofg htofg tohfg othfg hotfg ohtfg thfog htfog tfhog fthog hftog fhtog tofhg otfhg tfohg ftohg ofthg fothg hoftg ohftg hfotg fhotg ofhtg fohtg
Note: these 'words' (valid or invalid) are all the permutations of the word gthof. These words are obtained by scrambling the letters in gthof.