abrin barin arbin rabin brain rbain abirn bairn aibrn iabrn biarn ibarn aribn raibn airbn iarbn riabn irabn brian rbian biran ibran riban irban abrni barni arbni rabni brani rbani abnri banri anbri nabri bnari nbari arnbi ranbi anrbi narbi rnabi nrabi brnai rbnai bnrai nbrai rnbai nrbai abinr bainr aibnr iabnr bianr ibanr abnir banir anbir nabir bnair nbair ainbr ianbr anibr naibr inabr niabr binar ibnar bniar nbiar inbar nibar arinb rainb airnb iarnb rianb iranb arnib ranib anrib narib rnaib nraib ainrb ianrb anirb nairb inarb niarb rinab irnab rniab nriab inrab nirab brina rbina birna ibrna ribna irbna brnia rbnia bnria nbria rnbia nrbia binra ibnra bnira nbira inbra nibra rinba irnba rniba nriba inrba nirba
Note: these 'words' (valid or invalid) are all the permutations of the word abrin. These words are obtained by scrambling the letters in abrin.