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