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

public class average
{ public static void main (String[] pars) throws Exception
  { BufferedReader f = new BufferedReader(new FileReader("average.in"));
    StringTokenizer t;
    String text;
    int sections, teamnr;
    float distance;
    boolean dsq;
    int secs;
    String zeit,sub;
    int spkm;
    
    text = f.readLine();
    t = new StringTokenizer(text);
    sections = Integer.parseInt(t.nextToken());
    distance = Float.parseFloat(t.nextToken());
    while ((text = f.readLine()) != null) 
    { if (text.compareTo("") != 0)
      { dsq = false;
        t = new StringTokenizer(text);
        teamnr = Integer.parseInt(t.nextToken());
        secs = 0;
        for (int i = 1; i <= sections; i++)
        { zeit = t.nextToken();
          if (zeit.compareTo("-:--:--") == 0) dsq = true;
  	  else
	  { sub = zeit.substring(zeit.length()-2,zeit.length());
	    secs = secs + Integer.parseInt(sub);
	    sub = zeit.substring(zeit.length()-5,zeit.length()-3);
	    secs = secs + 60 * Integer.parseInt(sub);
	    sub = zeit.substring(0,zeit.length()-6);
	    secs = secs + 3600 * Integer.parseInt(sub);
	  }
        }
        spkm = (int)(secs/distance);
        if (secs/distance - (int)(secs/distance) >= 0.5) spkm++; 
        if (teamnr < 10) System.out.print(" ");
        if (teamnr < 100) System.out.print(" ");
        System.out.print(teamnr + ": ");
        if (dsq) System.out.println("-");
        else
        { System.out.print(spkm/60 + ":");
          if (spkm%60 < 10) System.out.print("0");
          System.out.println(spkm%60 + " min/km"); 
        }
      }		
    }
  }
}