. . . "ated cost on the basis of a cost function defined as follows: i) if the chunk located was not previously included in said lexicon CostW i,j =CSLEX ii) otherwise, CostW i,j =CSLEX+(Cfs???CSLEX)*(1???NOL/NW)/K wherein Cfs is equal to said second cost (CM) or said first cost (CF) depending on whether the word considered was located by means of said second search (B) or said first search (A), K is a c" .