robin orbin rboin broin obrin borin roibn oribn riobn irobn oirbn iorbn rbion brion ribon irbon biron ibron obirn boirn oibrn iobrn biorn iborn robni orbni rboni broni obrni borni ronbi ornbi rnobi nrobi onrbi norbi rbnoi brnoi rnboi nrboi bnroi nbroi obnri bonri onbri nobri bnori nbori roinb orinb rionb ironb oirnb iornb ronib ornib rnoib nroib onrib norib rinob irnob rniob nriob inrob nirob oinrb ionrb onirb noirb inorb niorb rbino brino ribno irbno birno ibrno rbnio brnio rnbio nrbio bnrio nbrio rinbo irnbo rnibo nribo inrbo nirbo binro ibnro bniro nbiro inbro nibro obinr boinr oibnr iobnr bionr ibonr obnir bonir onbir nobir bnoir nboir oinbr ionbr onibr noibr inobr niobr binor ibnor bnior nbior inbor nibor
Note: these 'words' (valid or invalid) are all the permutations of the word robin. These words are obtained by scrambling the letters in robin.