/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package recyclednumbers;

import java.util.HashSet;

/**
 *
 * @author vandit
 */
public class RecycleNumbers {

    private HashSet<String> numbers = new HashSet<String>();
    private HashSet<String> initialTempNumbers = new HashSet<String>();
    private HashSet<String> finalTempNumbers = new HashSet<String>();

    HashSet<Pair> numberPairs = new HashSet<Pair>();


    private void findRecycledNumbers(int start, int end, int places) {


        for (int i = start; i <= end; i++) {
            String initialNumber = Integer.toString(i);
            //if (!(numbers.contains(initialNumber) || finalTempNumbers.contains(initialNumber))) {

                StringBuffer tempNumber = new StringBuffer(initialNumber);
                int len = tempNumber.length();
                int startIndexToMove = len - places;
                String tempString = tempNumber.substring(startIndexToMove);
                if ((places == 1 && tempString.equals("0")) || tempString.charAt(0) == '0') {
                    continue;
                }
                tempNumber.delete(startIndexToMove, len);
                String finalTempNumber = tempString + tempNumber.toString();

                if (! (finalTempNumber.equals(initialNumber) || Integer.parseInt(finalTempNumber) > end || Integer.parseInt(finalTempNumber) < Integer.parseInt(initialNumber))) {
                    numbers.add(initialNumber);
                    finalTempNumbers.add(finalTempNumber);
                    Pair pair = new Pair(finalTempNumber,initialNumber);
                    numberPairs.add(pair);
                }
            }

        

    }

    public HashSet<Pair> findAllRecycledNumbers(int start, int end) {
        int length = Integer.toString(start).length();
        for (int i = 1; i < length; i++) {
            findRecycledNumbers(start, end, i);
        }
        return numberPairs;
    }
}

import java.util.*;
class xyz
{
	public static void main(String args[])
	{
		Scanner sc=new Scanner(System.in);
	int p=sc.nextInt();
	int t=1;
	while(p!=0)
	{
		int a= sc.nextInt();
		int b=sc.nextInt();
		int cnt=0;
		for(int i=a;i<=b;i++)
		{
			String s=""+i;

			int n=Integer.parseInt(s);
			char c[]=s.toCharArray();
			for(int j=1;j<(c.length);j++)
			{
				char temp;
				temp=c[0];

				for(int k=0;k<(c.length-1);k++)
				{


					c[k]=c[k+1];



				}
				c[c.length-1]=temp;
				String s1=new String(c);
				int w=Integer.parseInt(s1);
				if((w>n)&&(w>=a)&&(w<=b))
					cnt++;


			}
		}
		System.out.println("Case #"+t+": "+cnt);
		t++;
	p--;
	}
	}
}