import java.io.*;
import java.lang.*;
import java.util.*;

class ReadDB
{
public static void main(String[] args) {
	try{
		  FileReader in = new FileReader(args[0]);
	      BufferedReader data = new BufferedReader(in);
		  // read the first record of input file
		  String CurrentRecord = data.readLine();
		  String attribute;
		  StringTokenizer extractor;
		  int sum = 0;
          
		  // Read and process every record
		  while (CurrentRecord!=null) {
			  // use tokenizer to extract each attribute in a record
			  extractor = new StringTokenizer(CurrentRecord, " \t\n");
			  // extract the first attribute, which is the StudentNumber
			  attribute = extractor.nextToken();
			  System.out.print("StudentNumber: " + attribute + '\t');
  			  // extract the second attribute, which is the LastName
  			  attribute = extractor.nextToken();
			  System.out.print("LastName: " + attribute + "   " + '\t');
   			  // extract the third attribute, which is the grade
  			  attribute = extractor.nextToken();
			  System.out.println("Grade: " + attribute);
	  		  // sum the grade of all the records
			  sum = sum + (new Integer(attribute)).intValue();
			  // read the next record
			  CurrentRecord = data.readLine();
		  }
		  System.out.println("sum of grades: " + sum);
		  in.close();
		  data.close();
	}
	// input file must have exactly one record with 3 attributes each line
	catch (NumberFormatException e){
		System.out.println("Data format error in input file");
	}
	// I/O errors
	catch (IOException e){
		System.out.println("Unable to read input file");
	}
}
}