brown rbown borwn obrwn robwn orbwn brwon rbwon bwron wbron rwbon wrbon bowrn obwrn bworn wborn owbrn wobrn rowbn orwbn rwobn wrobn owrbn worbn bronw rbonw bornw obrnw robnw orbnw brnow rbnow bnrow nbrow rnbow nrbow bonrw obnrw bnorw nborw onbrw nobrw ronbw ornbw rnobw nrobw onrbw norbw brwno rbwno bwrno wbrno rwbno wrbno brnwo rbnwo bnrwo nbrwo rnbwo nrbwo bwnro wbnro bnwro nbwro wnbro nwbro rwnbo wrnbo rnwbo nrwbo wnrbo nwrbo bownr obwnr bwonr wbonr owbnr wobnr bonwr obnwr bnowr nbowr onbwr nobwr bwnor wbnor bnwor nbwor wnbor nwbor ownbr wonbr onwbr nowbr wnobr nwobr rownb orwnb rwonb wronb owrnb wornb ronwb ornwb rnowb nrowb onrwb norwb rwnob wrnob rnwob nrwob wnrob nwrob ownrb wonrb onwrb nowrb wnorb nworb
Note: these 'words' (valid or invalid) are all the permutations of the word brown. These words are obtained by scrambling the letters in brown.