tokens: Easy way : read the text files into one array ( first line of second file following last line of first file ( hint : fgets ) , sort the array ( hint : qsort ) , and output .
ner_tags: O O O O O B-File_Type O O O B-Data_Structure O O O O O O O O O O O O O O O B-Function O O O O B-Data_Structure O O O B-Function O O O O O