import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.*;
import java.util.*;

public class QualiC_Naive
{
  static void sop(String str)
  {
    System.out.println(str);
  }
  
  static void sop1(String str)
  {
    System.out.print(str);
  }
  
  public static void main(String args[])
  {
    long tstart = System.currentTimeMillis();
    if(args.length < 1)
    {
      System.out.println("You have not given input file!");
      System.exit(0);
    }
    File f1 = null;
    Scanner sc = null;
    try
    {
      f1 = new File(args[0]);
      sc = new Scanner(f1);
    }
    catch(Exception e)
    {
      System.out.println("Error opening the input file " + e);
    }
    /*
      int nCases, i, j, k, m, n;
      sc.next();
      sc.nextInt();
      sc.nextLine();
      sc.nextDouble();
    */
    int nCases, i, j, k, m, n;
    nCases = sc.nextInt();
    // sc.nextLine();
    for(i=1; i<=nCases; ++i)
    {
      int a = sc.nextInt();
      int b = sc.nextInt();
      int ans = 0;
      String strn = "" + a;
      // String strm = "" + b;
      int len = strn.length();
      int mult=0;
      switch(len)
      {
        case 2: mult = 10; break;
        case 3: mult = 100; break;
        case 4: mult = 1000; break;
        case 5: mult = 10000; break;
        case 6: mult = 100000; break;
        case 7: mult = 1000000; break;
      }
      if(len == 1)
        ans = 0;
      else
      { 
      /*
        try
	{
	  FileWriter tempf = new FileWriter("temp.dat");
	  BufferedWriter buff = new BufferedWriter(tempf);
	  buff.write("Case " + i + ":-------------------------------------------\n");
      */
        int c[] = new int[len];
        for(j=a; j<=b; j++)
	{ 
	  c[0] = j;
	  HashSet<Integer> x = new HashSet<Integer>();
	  for(k=1; k<len; k++)
	  {
	    c[k] = (c[k-1] % 10) * mult + c[k-1] / 10;
            if(j<c[k] && c[k]<=b)
	      {
	        if(x.add(c[k]))
	          ans++;
	   //   buff.write("" + j + " - " + c2 + "\n");
	      }
	  }

	}
	/*
	  buff.close();
	}
	catch(IOException e1)
	{
	  sop("Error: " + e1);
	}
	*/
      }
  
      sop("Case #" + i + ": " + ans);
    }
    long tend = System.currentTimeMillis();
    System.err.println("Time taken: " + (tend - tstart)/1000.0 + " seconds");
  } // end of main()
}

