hollow ohllow hlolow lholow olhlow lohlow hollow ohllow hlolow lholow olhlow lohlow hlloow lhloow hlloow lhloow llhoow llhoow ollhow lolhow ollhow lolhow llohow llohow hololw ohlolw hloolw lhoolw olholw loholw hoollw ohollw hoollw ohollw oohllw oohllw hloolw lhoolw hololw ohlolw loholw olholw olohlw loohlw oolhlw oolhlw loohlw olohlw hololw ohlolw hloolw lhoolw olholw loholw hoollw ohollw hoollw ohollw oohllw oohllw hloolw lhoolw hololw ohlolw loholw olholw olohlw loohlw oolhlw oolhlw loohlw olohlw hlloow lhloow hlloow lhloow llhoow llhoow hlolow lholow hollow ohllow lohlow olhlow hlolow lholow hollow ohllow lohlow olhlow llohow llohow lolhow ollhow lolhow ollhow ollohw lolohw ollohw lolohw lloohw lloohw ololhw loolhw oollhw oollhw loolhw ololhw ololhw loolhw oollhw oollhw loolhw ololhw lloohw lloohw lolohw ollohw lolohw ollohw hollwo ohllwo hlolwo lholwo olhlwo lohlwo hollwo ohllwo hlolwo lholwo olhlwo lohlwo hllowo lhlowo hllowo lhlowo llhowo llhowo ollhwo lolhwo ollhwo lolhwo llohwo llohwo holwlo ohlwlo hlowlo lhowlo olhwlo lohwlo howllo ohwllo hwollo whollo owhllo wohllo hlwolo lhwolo hwlolo whlolo lwholo wlholo olwhlo lowhlo owlhlo wolhlo lwohlo wlohlo holwlo ohlwlo hlowlo lhowlo olhwlo lohwlo howllo ohwllo hwollo whollo owhllo wohllo hlwolo lhwolo hwlolo whlolo lwholo wlholo olwhlo lowhlo owlhlo wolhlo lwohlo wlohlo hllwoo lhlwoo hllwoo lhlwoo llhwoo llhwoo hlwloo lhwloo hwlloo whlloo lwhloo wlhloo hlwloo lhwloo hwlloo whlloo lwhloo wlhloo llwhoo llwhoo lwlhoo wllhoo lwlhoo wllhoo ollwho lolwho ollwho lolwho llowho llowho olwlho lowlho owllho wollho lwolho wlolho olwlho lowlho owllho wollho lwolho wlolho llwoho llwoho lwloho wlloho lwloho wlloho holowl ohlowl hloowl lhoowl olhowl lohowl hoolwl oholwl hoolwl oholwl oohlwl oohlwl hloowl lhoowl holowl ohlowl lohowl olhowl olohwl loohwl oolhwl oolhwl loohwl olohwl holwol ohlwol hlowol lhowol olhwol lohwol howlol ohwlol hwolol wholol owhlol wohlol hlwool lhwool hwlool whlool lwhool wlhool olwhol lowhol owlhol wolhol lwohol wlohol hoowll ohowll hoowll ohowll oohwll oohwll howoll ohwoll hwooll whooll owholl woholl howoll ohwoll hwooll whooll owholl woholl oowhll oowhll owohll woohll owohll woohll hlowol lhowol holwol ohlwol lohwol olhwol hlwool lhwool hwlool whlool lwhool wlhool howlol ohwlol hwolol wholol owhlol wohlol lowhol olwhol lwohol wlohol owlhol wolhol olowhl loowhl oolwhl oolwhl loowhl olowhl olwohl lowohl owlohl wolohl lwoohl wloohl oowlhl oowlhl owolhl woolhl owolhl woolhl lowohl olwohl lwoohl wloohl owlohl wolohl holowl ohlowl hloowl lhoowl olhowl lohowl hoolwl oholwl hoolwl oholwl oohlwl oohlwl hloowl lhoowl holowl ohlowl lohowl olhowl olohwl loohwl oolhwl oolhwl loohwl olohwl holwol ohlwol hlowol lhowol olhwol lohwol howlol ohwlol hwolol wholol owhlol wohlol hlwool lhwool hwlool whlool lwhool wlhool olwhol lowhol owlhol wolhol lwohol wlohol hoowll ohowll hoowll ohowll oohwll oohwll howoll ohwoll hwooll whooll owholl woholl howoll ohwoll hwooll whooll owholl woholl oowhll oowhll owohll woohll owohll woohll hlowol lhowol holwol ohlwol lohwol olhwol hlwool lhwool hwlool whlool lwhool wlhool howlol ohwlol hwolol wholol owhlol wohlol lowhol olwhol lwohol wlohol owlhol wolhol olowhl loowhl oolwhl oolwhl loowhl olowhl olwohl lowohl owlohl wolohl lwoohl wloohl oowlhl oowlhl owolhl woolhl owolhl woolhl lowohl olwohl lwoohl wloohl owlohl wolohl hllowo lhlowo hllowo lhlowo llhowo llhowo hlolwo lholwo hollwo ohllwo lohlwo olhlwo hlolwo lholwo hollwo ohllwo lohlwo olhlwo llohwo llohwo lolhwo ollhwo lolhwo ollhwo hllwoo lhlwoo hllwoo lhlwoo llhwoo llhwoo hlwloo lhwloo hwlloo whlloo lwhloo wlhloo hlwloo lhwloo hwlloo whlloo lwhloo wlhloo llwhoo llwhoo lwlhoo wllhoo lwlhoo wllhoo hlowlo lhowlo holwlo ohlwlo lohwlo olhwlo hlwolo lhwolo hwlolo whlolo lwholo wlholo howllo ohwllo hwollo whollo owhllo wohllo lowhlo olwhlo lwohlo wlohlo owlhlo wolhlo hlowlo lhowlo holwlo ohlwlo lohwlo olhwlo hlwolo lhwolo hwlolo whlolo lwholo wlholo howllo ohwllo hwollo whollo owhllo wohllo lowhlo olwhlo lwohlo wlohlo owlhlo wolhlo llowho llowho lolwho ollwho lolwho ollwho llwoho llwoho lwloho wlloho lwloho wlloho lowlho olwlho lwolho wlolho owllho wollho lowlho olwlho lwolho wlolho owllho wollho ollowh lolowh ollowh lolowh lloowh lloowh ololwh loolwh oollwh oollwh loolwh ololwh ololwh loolwh oollwh oollwh loolwh ololwh lloowh lloowh lolowh ollowh lolowh ollowh ollwoh lolwoh ollwoh lolwoh llowoh llowoh olwloh lowloh owlloh wolloh lwoloh wloloh olwloh lowloh owlloh wolloh lwoloh wloloh llwooh llwooh lwlooh wllooh lwlooh wllooh olowlh loowlh oolwlh oolwlh loowlh olowlh olwolh lowolh owlolh wololh lwoolh wloolh oowllh oowllh owollh woollh owollh woollh lowolh olwolh lwoolh wloolh owlolh wololh olowlh loowlh oolwlh oolwlh loowlh olowlh olwolh lowolh owlolh wololh lwoolh wloolh oowllh oowllh owollh woollh owollh woollh lowolh olwolh lwoolh wloolh owlolh wololh llowoh llowoh lolwoh ollwoh lolwoh ollwoh llwooh llwooh lwlooh wllooh lwlooh wllooh lowloh olwloh lwoloh wloloh owlloh wolloh lowloh olwloh lwoloh wloloh owlloh wolloh
Note: these 'words' (valid or invalid) are all the permutations of the word hollow. These words are obtained by scrambling the letters in hollow.