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 static java.util.Arrays.deepToString;

import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Scanner;

public class QC {

	public static void main(String[] args) throws Exception 
	{
		new QC().run();
		
	}

	int calculateDigit(int num)
	{
		int res = 0;
		
		while(num>0)
		{
			res++;
			num = num/10;
		}
		
		return res;
	}
	
	void run() throws Exception 
	{
		//Scanner sc = new Scanner(System.in);
		//PrintWriter pw = new PrintWriter(System.out);
		
		Scanner sc = new Scanner(new FileReader("C-large.in"));
		
		FileWriter fstream = new FileWriter("out.in");
		BufferedWriter out = new BufferedWriter(fstream);

		int ntest = Integer.valueOf(sc.nextLine());
		
		
		
		for(int test=1;test<=ntest;++test) 
		{
			int min = sc.nextInt();
			int max = sc.nextInt();
			int score = 0;

			for(int i=min; i<=max; i++)
			{
				int digit = calculateDigit(i);
				List<Integer> list = new ArrayList<Integer>();
				for(int j=1; j<digit; j++)
				{
					
					int head = (int) (i/(Math.pow(10, j)));
					int tail = (int) (i%(Math.pow(10, j)));
					
					int mix = (int) (tail*Math.pow(10,(digit-j)) + head);
					//debug(i+ " " +head+" "+tail);
					if(list.indexOf(mix) == -1 && mix <= max && mix > i && calculateDigit(mix) == calculateDigit(i))
					{
						//debug(i + " " +mix);
						list.add(mix);
						score++;
					}
				}
				
			}
		
			out.write("Case #" + test + ": ");
			out.write(score+"");
			debug(score);
			out.write("\n");
		}
		out.close();
		sc.close();
	
	}
	
	void debug(Object...os) 
	{
		System.err.println(deepToString(os));
	} 
	
	void debugArray(Object[]...os) 
	{
		System.err.println(deepToString(os));
	} 
}
