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.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;
import java.util.Vector;


public class Main {
	public static int recycled (int A,int B)
	{
		
		if(B<10)return 0;
		String N,M;
		int taille=1,Nbr=0;
		for(int i=10;i<=B;i*=10)taille++;
		for(int i=A;i<=B;i++)
		{
			Vector<Integer> list = new Vector<Integer>();
			N=Integer.toString(i);
			//M=N.substring(1)+N.charAt(0);
			for(int k=0;k<N.length()-1;k++)
			{
				N=N.substring(1)+N.charAt(0);
				if(A<=Integer.parseInt(N)&&Integer.parseInt(N)<=B&&i<Integer.parseInt(N))
					{
					if(!list.contains(Integer.parseInt(N)))
						{
							list.add(Integer.parseInt(N));
							//System.out.println(N  +"       "+i);
							Nbr++;
						}
					}
			}
		}
		return Nbr;
	}
	public static void main(String[] args) throws FileNotFoundException {
		Scanner in =new Scanner(new File("C-small.in"));
		PrintWriter out=new PrintWriter("C-small.out");
		int T,A,B;
		T=in.nextInt();
		for(int i=0;i<T;i++)
		{
			A=in.nextInt();
			B=in.nextInt();
			out.print("Case #"+(i+1)+": ");
			out.print(recycled(A, B));
			if(i+1!=T) out.println("");
		}
		out.close();
		in.close();
	}
}
