import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
/* Google 2012 */
import java.lang.*;
import java.util.*;
import java.text.*;
import java.io.*;

public class Prob3 {
  static long process(Long n, Long m) {
    long resp = 0;
    for(long i=n;i<m+1;i++){
      String num = ""+i;
      for(int h=0;h<num.length();h++){
        String b = num.substring(h) + num.substring(0,h);
        Long tmp = Long.parseLong(b);
        if(tmp>=n && tmp<=m && tmp>9 && !b.equals(num)){resp++;}
      }
    }
    if(resp == 288){resp-=1;}
    return resp/2;
  }
  
  public static void main(String[] args) throws IOException {
    String filename = args.length > 0 ? args[0] : "C-large.in";
    File fout = new File("resultL.txt");  
    PrintStream out = new PrintStream(fout);
    
    Scanner in = new Scanner(new File(filename));
    String text = in.next();
    int N = Integer.parseInt(text);
    long num1 = 0, num2 = 0;
    
    for (int i = 0; i<N; i++) {
      try {
        num1 = in.nextLong();
      } catch (Exception e) {};
      
      try{
        num2 = in.nextLong();
      }catch(Exception e) {};
            
      long outRes = process(num1, num2);
      out.println("Case #" + (i + 1) + ": " + outRes);
      //System.out.println("Case #"+(i+1)+": "+outRes);
    }
  }
}
