import java.util.Random;

public class DiceRoll {
  public static void main(String[] args) {
    int[] results = new int[11];
    for (int i = 0; i < 36000; i++) {
      results[Roll()] += 1;
    }
    for (int i = 0; i < 11; i++) {
      System.out.print(i+2 + " : ");
      System.out.println(results[i]);
    }
  }

  public static int Roll() {
    int[] dice = new int[2];
    dice[0] = new Random().nextInt(6);
    dice[1] = new Random().nextInt(6);
    return dice[0] + dice[1];
  }
}