proofs rpoofs porofs oprofs ropofs orpofs proofs rpoofs porofs oprofs ropofs orpofs poorfs oporfs poorfs oporfs ooprfs ooprfs roopfs oropfs roopfs oropfs oorpfs oorpfs profos rpofos porfos oprfos ropfos orpfos prfoos rpfoos pfroos fproos rfpoos frpoos pofros opfros pforos fporos ofpros fopros rofpos orfpos rfopos fropos ofrpos forpos profos rpofos porfos oprfos ropfos orpfos prfoos rpfoos pfroos fproos rfpoos frpoos pofros opfros pforos fporos ofpros fopros rofpos orfpos rfopos fropos ofrpos forpos poofrs opofrs poofrs opofrs oopfrs oopfrs pofors opfors pfoors fpoors ofpors fopors pofors opfors pfoors fpoors ofpors fopors oofprs oofprs ofoprs fooprs ofoprs fooprs roofps orofps roofps orofps oorfps oorfps rofops orfops rfoops froops ofrops forops rofops orfops rfoops froops ofrops forops oofrps oofrps oforps foorps oforps foorps proosf rpoosf porosf oprosf roposf orposf proosf rpoosf porosf oprosf roposf orposf poorsf oporsf poorsf oporsf ooprsf ooprsf roopsf oropsf roopsf oropsf oorpsf oorpsf prosof rposof porsof oprsof ropsof orpsof prsoof rpsoof psroof sproof rspoof srpoof posrof opsrof psorof sporof osprof soprof rospof orspof rsopof sropof osrpof sorpof prosof rposof porsof oprsof ropsof orpsof prsoof rpsoof psroof sproof rspoof srpoof posrof opsrof psorof sporof osprof soprof rospof orspof rsopof sropof osrpof sorpof poosrf oposrf poosrf oposrf oopsrf oopsrf posorf opsorf psoorf spoorf osporf soporf posorf opsorf psoorf spoorf osporf soporf oosprf oosprf osoprf sooprf osoprf sooprf roospf orospf roospf orospf oorspf oorspf rosopf orsopf rsoopf sroopf osropf soropf rosopf orsopf rsoopf sroopf osropf soropf oosrpf oosrpf osorpf soorpf osorpf soorpf profso rpofso porfso oprfso ropfso orpfso prfoso rpfoso pfroso fproso rfposo frposo pofrso opfrso pforso fporso ofprso foprso rofpso orfpso rfopso fropso ofrpso forpso prosfo rposfo porsfo oprsfo ropsfo orpsfo prsofo rpsofo psrofo sprofo rspofo srpofo posrfo opsrfo psorfo sporfo osprfo soprfo rospfo orspfo rsopfo sropfo osrpfo sorpfo prfsoo rpfsoo pfrsoo fprsoo rfpsoo frpsoo prsfoo rpsfoo psrfoo sprfoo rspfoo srpfoo pfsroo fpsroo psfroo spfroo fsproo sfproo rfspoo frspoo rsfpoo srfpoo fsrpoo sfrpoo pofsro opfsro pfosro fposro ofpsro fopsro posfro opsfro psofro spofro ospfro sopfro pfsoro fpsoro psforo spforo fsporo sfporo ofspro fospro osfpro sofpro fsopro sfopro rofspo orfspo rfospo frospo ofrspo forspo rosfpo orsfpo rsofpo srofpo osrfpo sorfpo rfsopo frsopo rsfopo srfopo fsropo sfropo ofsrpo fosrpo osfrpo sofrpo fsorpo sforpo profso rpofso porfso oprfso ropfso orpfso prfoso rpfoso pfroso fproso rfposo frposo pofrso opfrso pforso fporso ofprso foprso rofpso orfpso rfopso fropso ofrpso forpso prosfo rposfo porsfo oprsfo ropsfo orpsfo prsofo rpsofo psrofo sprofo rspofo srpofo posrfo opsrfo psorfo sporfo osprfo soprfo rospfo orspfo rsopfo sropfo osrpfo sorpfo prfsoo rpfsoo pfrsoo fprsoo rfpsoo frpsoo prsfoo rpsfoo psrfoo sprfoo rspfoo srpfoo pfsroo fpsroo psfroo spfroo fsproo sfproo rfspoo frspoo rsfpoo srfpoo fsrpoo sfrpoo pofsro opfsro pfosro fposro ofpsro fopsro posfro opsfro psofro spofro ospfro sopfro pfsoro fpsoro psforo spforo fsporo sfporo ofspro fospro osfpro sofpro fsopro sfopro rofspo orfspo rfospo frospo ofrspo forspo rosfpo orsfpo rsofpo srofpo osrfpo sorfpo rfsopo frsopo rsfopo srfopo fsropo sfropo ofsrpo fosrpo osfrpo sofrpo fsorpo sforpo poofsr opofsr poofsr opofsr oopfsr oopfsr pofosr opfosr pfoosr fpoosr ofposr foposr pofosr opfosr pfoosr fpoosr ofposr foposr oofpsr oofpsr ofopsr foopsr ofopsr foopsr poosfr oposfr poosfr oposfr oopsfr oopsfr posofr opsofr psoofr spoofr ospofr sopofr posofr opsofr psoofr spoofr ospofr sopofr oospfr oospfr osopfr soopfr osopfr soopfr pofsor opfsor pfosor fposor ofpsor fopsor posfor opsfor psofor spofor ospfor sopfor pfsoor fpsoor psfoor spfoor fspoor sfpoor ofspor fospor osfpor sofpor fsopor sfopor pofsor opfsor pfosor fposor ofpsor fopsor posfor opsfor psofor spofor ospfor sopfor pfsoor fpsoor psfoor spfoor fspoor sfpoor ofspor fospor osfpor sofpor fsopor sfopor oofspr oofspr ofospr foospr ofospr foospr oosfpr oosfpr osofpr soofpr osofpr soofpr ofsopr fosopr osfopr sofopr fsoopr sfoopr ofsopr fosopr osfopr sofopr fsoopr sfoopr roofsp orofsp roofsp orofsp oorfsp oorfsp rofosp orfosp rfoosp froosp ofrosp forosp rofosp orfosp rfoosp froosp ofrosp forosp oofrsp oofrsp oforsp foorsp oforsp foorsp roosfp orosfp roosfp orosfp oorsfp oorsfp rosofp orsofp rsoofp sroofp osrofp sorofp rosofp orsofp rsoofp sroofp osrofp sorofp oosrfp oosrfp osorfp soorfp osorfp soorfp rofsop orfsop rfosop frosop ofrsop forsop rosfop orsfop rsofop srofop osrfop sorfop rfsoop frsoop rsfoop srfoop fsroop sfroop ofsrop fosrop osfrop sofrop fsorop sforop rofsop orfsop rfosop frosop ofrsop forsop rosfop orsfop rsofop srofop osrfop sorfop rfsoop frsoop rsfoop srfoop fsroop sfroop ofsrop fosrop osfrop sofrop fsorop sforop oofsrp oofsrp ofosrp foosrp ofosrp foosrp oosfrp oosfrp osofrp soofrp osofrp soofrp ofsorp fosorp osforp soforp fsoorp sfoorp ofsorp fosorp osforp soforp fsoorp sfoorp
Note: these 'words' (valid or invalid) are all the permutations of the word proofs. These words are obtained by scrambling the letters in proofs.