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.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.*;

public class jam3 {

	/**
	 * @param args
	 */
	static int chuli(String s)
	{
		int count = 0;
		String[] ab = s.split(" ");
		int a = Integer.parseInt(ab[0]);
		int b = Integer.parseInt(ab[1]);
		HashSet<String> over = new HashSet<String>();
		HashSet<String> cur = new HashSet<String>();
		for(int i=a;i<=b;i++)
		{
			String is = String.valueOf(i);
			if(!over.contains(is))
			{
				cur.clear();
				String is2 = is+is;
				for(int i2=0;i2<is.length();i2++)
				{
					String ns = is2.substring(i2, i2+is.length());
					int ins = Integer.parseInt(ns);
					if(ins>=a&&ins<=b)
						cur.add(ns);
				}
				count+=(cur.size()*(cur.size()-1))/2;
				over.addAll(cur);
			}
		}
		return count;
	}
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try{
			/*
	    	System.out.println(chuli("1 9"));
	    	System.out.println(chuli("10 40"));
	    	System.out.println(chuli("100 500"));
	    	System.out.println(chuli("1111 2222"));
		    */
			File fin1 = new File("d:\\C-large.in");
	    	FileInputStream fs1 = new FileInputStream(fin1);
	    	BufferedReader br1 = new BufferedReader(new InputStreamReader(fs1));
	    	
	    	File fout6 = new File("d:\\cjamout1");
	    	FileOutputStream fos6 = new FileOutputStream(fout6);
	    	BufferedWriter wr6 = new BufferedWriter(new OutputStreamWriter(fos6));
	        
	    	String line = br1.readLine();
	    	int n = 1;
	    	line = br1.readLine();
	    	while(line!=null)
	    	{
	    	   if(!line.trim().equals(""))
	    	   {
	    		   wr6.write("Case #"+String.valueOf(n++)+": "+String.valueOf(chuli(line)));
	    	       wr6.newLine();
	    	   }
	    	   line = br1.readLine();
	    	  
			}
	    	br1.close();
	    	fs1.close();
	    	
	    	wr6.close();
	    	fos6.close();
	    	
		}
		catch(Exception e)
		{
			e.printStackTrace();
		}
	}

}
