anchor.diff:  K_MORE: M O R E;
   K_IMPORTANT: I M P O R T A N T;
   K_THAN: T H A N;
  +K_SAMPLE: S A M P L E
  +K_RANDOMSUBSETS: R A N D O M '_' S U B S E T S
  +K_COUNT: C O U N T
  +K_DIMENSION: D I M E N S I O N
   
   
   
  
positive.code: 
   
  fragment DIGIT : [0-9];
  
  fragment A : [aA];
  fragment B : [bB];
  
negative.code:  | K_MORE
   | K_IMPORTANT
   | K_THAN
   | K_SAMPLE
   | K_RANDOMSUBSETS
   | K_COUNT
   | K_DIMENSION
   ;
  
  
  