using System;

using System.Collections;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        var x = Convert.ToInt32(Console.ReadLine()); 

        var m = new List<int>();

        for(int i = 0; i < x; i++)

        {

            var a = Convert.ToInt32(Console.ReadLine()); 

            var b = Convert.ToInt32(Console.ReadLine()); 

            var k = Convert.ToInt32(Console.ReadLine());

            var n = 0;

            for(int j = a; j<b;j++)

            {

                if(j%k==0)

                {

                    n+=1;

                }               

            }

​

            m.Add(n);

        }

        for(int l=0;l<x;l++)

        {

            var t=l+1;

            Console.WriteLine("Case "+t+": "+m[l]);

        }

    }

}