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.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


public class RecycledNumbersCodeJam2012Q {

	public long  solves(String A,String B){
		long a = Long.parseLong(A);
		long b = Long.parseLong(B);
		long s = 0 ; 
		for(long i = a ;i <= b; i++){
			s+= possibilities( Long.toString(i), a, b);
		}
		return s;
	}
	public long possibilities(String A,long a , long b ){
		long s = 0 ;
		long a0 = Long.parseLong(A);
		List<String> dup = new ArrayList<String>();
		dup.add(A);
		for(int i = 1 ; i < A.length();i++){
			String n= A.substring(i);
			String n1= A.substring(0,i);
			String aa = new String(n+n1);
			//System.out.println(aa);
			
			long a1= Long.parseLong(aa);
			
			if ( a1 < a0 &&  a1>= a && a1<=b && !dup.contains(aa)){	
				++s;
				dup.add(aa);
			}
		}
		return s ;
	}
	public static void main(String[] args) throws IOException {
		RecycledNumbersCodeJam2012Q si = new RecycledNumbersCodeJam2012Q();
	
		int T ;
		String CurLine = ""; 
	        
		InputStreamReader converter = new InputStreamReader(System.in);
		BufferedReader in = new BufferedReader(converter);
		CurLine = in.readLine();
		T= Integer.parseInt(CurLine);
		
		for(int i = 0 ; i < T;i++) {
			CurLine = in.readLine();
			String A = CurLine.split(" ")[0];
			String B = CurLine.split(" ")[1];
			System.out.println("Case #"+ (i+1)+": "+si.solves(A,B));
			
		}
	}
	
}
