/*
 * 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.*;
import java.io.*;



public class c {
	public static void main(String arg[]){
		int T;
		Scanner cin=new Scanner(System.in);
		T=cin.nextInt();
		for(int t=0;t<T;t++){
			int n=cin.nextInt();
			int m=cin.nextInt();
			int ans=0;
			for(int i=n;i<m;i++){
////				if(i>150)
//					break;
				int size=1;
				int num=0;
				while (true){
					num++;
					if(i>=size && i<size*10)
						break;
					else size*=10;
				}
				int copy=i;
		//		String sc=((Integer)i).toString();
				ArrayList<Integer> now= new ArrayList();
				for(int j=0;j<num-1;j++){
		//			sc=new String(sc.substring(1)+sc.substring(0,1));
		//			int tmp=Integer.parseInt(sc);
					copy=10*(copy%size)+copy/size;

		//			if(copy!=tmp){
		//				System.out.println("ERR----------");
		//			}
			//		System.out.println(i + " " +copy);
					if(copy>i && copy <=m && now.indexOf(copy)==-1){
						ans++;
					//	System.out.println(" " + i + " " +copy);
						now.add(copy);
					}
				}
			}
			System.out.println( "Case #" +( t+1 )+ ": " + ans );
		}
	}
}
