import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

public class MergeReport
{
   public static void main(String[] args) throws IOException
   {
      PrintStream output = System.out;
      
      Map<String, List<Double>> grades = new HashMap<String, List<Double>>();
      
      for (String filename : args)
      {
         Scanner input = new Scanner(new File(filename));
         while (input.hasNext())
         {
            String acct = input.next();
            Double grade = input.nextDouble();
            
            List<Double> acctGrades = grades.get(acct);
            if (acctGrades == null)
            {
               acctGrades = new ArrayList<Double>();
            }
            acctGrades.add(grade);
            
            grades.put(acct, acctGrades);           
         }
      }
      output.println(grades);
   }
}