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.*;

public class C
{
    public static int front;

    public static int rotate(int in)
    {
	return (in / 10) + front*(in % 10);
    }

    public static void main(String[] args)
    {
	Scanner in = new Scanner(System.in);

	int T = in.nextInt();

	for(int c = 1; c <= T; c++){
	    int ans = 0;

	    int A = in.nextInt();
	    int B = in.nextInt();

	    int ndig = ("" + A).length();
	    front = 1;
	    for(int i = 1; i < ndig; i++)
		front *= 10;
	    
	    for(int num = A; num <= B; num++){
		int count = 1;
		int rot = rotate(num);
		boolean smallest=true;
		while(smallest &&  rot!= num){
		    if(A <= rot && rot <= B)
			if(rot < num)
			    smallest = false;
			else
			    count++;
		    rot = rotate(rot);
		}
		if(smallest)
		    ans += count*(count - 1)/2;
	    }	

	    System.out.println("Case #" + c + ": " + ans);
	}



    }


}