anchor.diff:  ,regexdna,g95,0
   ,regexdna,ifc,0
   ,regexdna,gpp,0
  +,regexdna,icpp,0
   ,regexdna,bigforth,3
   ,regexdna,gnat,2
   ,regexdna,perl,0
  
positive.code: ,message,pnet,0
  ,message,gpp,0
  ,message,gpp,3
  ,message,clean,0
  
  ,message,iron,0
  
negative.code: ,binarytrees,ocaml,4
  ,binarytrees,clean,0
  ,binarytrees,gpp,0
  ,binarytrees,icpp,0
  
  ,binarytrees,lisaac,0
  
  