anchor.diff:  :
      ~'\n'+
   ;
  +
  +mode M_SHA1;
  +
  +M_SHA1_DEC_PART
  +:
  +   F_Digit+
  +;
  +
  +M_SHA1_HEX_PART
  +:
  +   F_HexDigit+ -> popMode
  +;
  +
  +M_SHA1_WS
  +:
  +   ' '+ -> channel(HIDDEN)
  +;
  
positive.code: SFLOW
  :
     'sflow'
  ;
  
  SHELL
  
negative.code:    'deny'
  ;
  
  DES
  :
     'des' -> pushMode(M_DES) 
  ;
  
  DES_SHA1
  :
     'des-sha1'
  