The BestSearchString function
BestSearchString(pattern : name, target :
name)
finds the match of a pattern against a body of text
which minimizes the total number of mismatches. It returns an
offset to the character directly before where this best match occurs.
> BestSearchString('CYIQNCPRG', 'PPATBCYTQNCPLGFPTTSPS');
5
> BestSearchString('CYIQNCPRG', 'XXXXXXXXXXXXXXXXX');
> # just take the first
0