fiber ifber fbier bfier ibfer bifer fiebr ifebr feibr efibr iefbr eifbr fbeir bfeir febir efbir befir ebfir ibefr biefr iebfr eibfr beifr ebifr fibre ifbre fbire bfire ibfre bifre firbe ifrbe fribe rfibe irfbe rifbe fbrie bfrie frbie rfbie brfie rbfie ibrfe birfe irbfe ribfe brife rbife fierb iferb feirb efirb iefrb eifrb fireb ifreb frieb rfieb irfeb rifeb ferib efrib freib rfeib erfib refib ierfb eirfb irefb riefb erifb reifb fberi bferi febri efbri befri ebfri fbrei bfrei frbei rfbei brfei rbfei ferbi efrbi frebi rfebi erfbi refbi berfi ebrfi brefi rbefi erbfi rebfi iberf bierf iebrf eibrf beirf ebirf ibref biref irbef ribef brief rbief ierbf eirbf irebf riebf eribf reibf berif ebrif breif rbeif erbif rebif
Note: these 'words' (valid or invalid) are all the permutations of the word fiber. These words are obtained by scrambling the letters in fiber.