import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class codejamp3 {
	public static char[] map;
	public static void main(String[] args) throws IOException{
		readFile();
	}

	public static String getResult(String input){
		int resultInt = 0;
		Set<Integer> exist = new HashSet<Integer>();
		String[] splitResult = input.split(" ");
		int numberA = Integer.parseInt(splitResult[0]);
		int numberB = Integer.parseInt(splitResult[1]);
		for(int i = numberA; i < numberB; i++){
			int current = i;
			exist.clear();
			int length1 = String.valueOf(current).length();
			int j = 10;
			while(j<=current){
				int remain = current%j;
				int length2 = String.valueOf(j).length(); 
				double b = Math.pow(10, length2-1);
				double a = Math.pow(10,length1);
				int currentResult = (int)(remain*a/b+current/j);
				if(current == 2022){
					System.out.println(remain+":"+(length2-1)+":"+currentResult);
				}
				if(currentResult <= numberB && currentResult > current){
					if(!exist.contains(currentResult)){
						exist.add(currentResult);
						resultInt++;
					}
				}
				j = j*10;
			}
		}
		return ""+resultInt;
	}
	public static void readFile() throws IOException{
			FileWriter fstream = new FileWriter("out.txt");
			BufferedWriter out = new BufferedWriter(fstream);
            FileReader input = new FileReader("in.txt");
            BufferedReader bufRead = new BufferedReader(input);	
            String line = bufRead.readLine();
            String current = getResult(line);
            int i = 1;
            out.write("Case #" + i + ": " + current);
            line = bufRead.readLine();
            while (line != null){
            	i++;
          	  	out.write('\n' + "Case #" + i + ": " + getResult(line));
          	  	line = bufRead.readLine();
            }             
            bufRead.close();
            out.close();
	}
}
