fubby ufbby fbuby bfuby ubfby bufby fubby ufbby fbuby bfuby ubfby bufby fbbuy bfbuy fbbuy bfbuy bbfuy bbfuy ubbfy bubfy ubbfy bubfy bbufy bbufy fubyb ufbyb fbuyb bfuyb ubfyb bufyb fuybb ufybb fyubb yfubb uyfbb yufbb fbyub bfyub fybub yfbub byfub ybfub ubyfb buyfb uybfb yubfb byufb ybufb fubyb ufbyb fbuyb bfuyb ubfyb bufyb fuybb ufybb fyubb yfubb uyfbb yufbb fbyub bfyub fybub yfbub byfub ybfub ubyfb buyfb uybfb yubfb byufb ybufb fbbyu bfbyu fbbyu bfbyu bbfyu bbfyu fbybu bfybu fybbu yfbbu byfbu ybfbu fbybu bfybu fybbu yfbbu byfbu ybfbu bbyfu bbyfu bybfu ybbfu bybfu ybbfu ubbyf bubyf ubbyf bubyf bbuyf bbuyf ubybf buybf uybbf yubbf byubf ybubf ubybf buybf uybbf yubbf byubf ybubf bbyuf bbyuf bybuf ybbuf bybuf ybbuf
Note: these 'words' (valid or invalid) are all the permutations of the word fubby. These words are obtained by scrambling the letters in fubby.