  
  [1X20 [33X[0;0YWords in free [22XZG[122X[101X[1X-modules[133X[101X
  
      │       [10XAddFreeWords(v,w) [110X       
      │    [10XAddFreeWordsModP(v,w,p) [110X    
      │     [10XAlgebraicReduction(w) [110X     
      │       [10XMultiply Word(n,w) [110X      
      │         [10XNegate([i,j]) [110X         
      │         [10XNegateWord(w) [110X         
      │      [10XPrintZGword(w,elts) [110X      
      │      [10XTietzeReduction(S,w) [110X     
      │ [10XResolutionBoundaryOfWord(R,n,w)[110X
  
