from alan w. smith
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  ALL       dull jack       dull    makes
 WORK     boy   play    makes no   dull   jack
  AND        dull       jack a  play      jack
   NO  jack   dull   all    dull no       dull
 PLAY        all a  jack    play     all
MAKES       boy  no makes     no boy   boy
 JACK    a   work       jack    makes  dull
    A   and    dull    jack boy    a   play
 DULL  work all     a      no     and makes
  BOY        no    makes  and     play     and