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

public class B {
  private static boolean isRecyclePair(int n, int m){
    String n_str=""+n;
    String m_str=""+m;
    for(int i=0; i<n_str.length(); i++){
      String candidate=n_str.substring(i)+n_str.substring(0, i);
      if(m_str.equals(candidate)) return true;
    }
    return false;
  }
  private static void gcjMethod(String[] input){
    int a=Integer.parseInt(input[0]);
    int b=Integer.parseInt(input[1]);
    int res=0;
    // System.out.format("A=%d, B=%d\n", a, b);
    for(int i=a; i<=b; i++)
      for(int j=i+1; j<=b; j++)
        if(isRecyclePair(i, j)) res++;
    System.out.println(res);
    return;
  }

  public static final void main(final String[] args) {
    String line;
    int numCase;
    String[] input;

    BufferedReader d = new BufferedReader(new InputStreamReader(System.in));
    try{
      numCase=Integer.parseInt(d.readLine());
      for(int i=0; i<numCase; i++){
        line=d.readLine();
        input=line.split(" ");
        System.out.print(String.format("Case #%d: ", i+1));
        gcjMethod(input);
      }
    }
    catch(Exception e){
      System.out.println(e);
    }
  }
}