import java.util.Random;

public class throwMillionDice{

    // solution to CMPSCI 187 Discussion #2, 19 September 2012
    // throw a million six-sided dice and report results
    // Ravali Pochampally, 26 September 2012

    public static void main(String[] args){

	// using no seed 
	Random r = new Random();  //comment this line if you need to use Random() with a seed

	// using seed 1776
	//Random r = new Random(1776);  //un-comment this line if you need to use Random() with a seed 
	
	int t = 1000000;
	int i,n1,n2;

	// array to store the 11 unique values of the sum
	int[] sum = new  int[11];
	
	
	for(i=0;i<t;i++){
	    n1 = r.nextInt(6)+1;
	    n2 = r.nextInt(6)+1;
	    
	    n1 = n1+n2;
	    
	    //((n1+n2)=2) is in sum[0] and so on..
	    sum[n1-2]+=1;
	}
	
	
	for(i=0;i<11;i++)
	    System.out.println((i+2)+" :\t"+sum[i]);
	

    }
}