using System;

public class Program

{

    public static void Main()

    {

        for (var i=0; i< 15; i++) {

            Console.WriteLine("{0} {1}", i, ClosestToSeven(i));

        }

    }

    static int ClosestToSeven(int num)

    {

       if (num % 7 == 0) return num;

       int lower = (num / 7) * 7;

       int higher = lower + 7;

       int closest = higher - num > num - lower ? lower : higher;

       return closest;

   }

}