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();
	}
}


/*
ID: codeKNIGHT
LANG: JAVA
TASK: 
*/
import java.util.*;
import java.math.*;
import java.io.*;
class recyledNumbers
{
    public static void main(String args[])throws IOException
    {
        //Scanner in=new Scanner(System.in);
        Scanner in=new Scanner(new FileReader("C:\\Users\\Lokesh\\Desktop\\C-small-attempt0.in"));
        //PrintWriter out=new PrintWriter(System.out);
        //BufferedReader br=new BufferedReader(new FileReader("C:\\Users\\Lokesh\\Desktop\\input.in"));
        PrintWriter out=new PrintWriter(new BufferedWriter(new FileWriter("E:\\programss\\GCJ\\output.txt")));
        int t=in.nextInt(),test,i,a,b,j;
        String s,s1,s2;
        for(test=1;test<=t;test++)
        {
            a=in.nextInt();
            b=in.nextInt();
            int c=0,k;
            
            for(i=a;i<=b;i++)
            {
                s=Integer.toString(i);
                int max=s.charAt(0);
                boolean stat=false;
                for(j=1;j<s.length();j++)
                {
                    if(s.charAt(j)>=max)
                    {
                        s1=s.substring(j,s.length());
                        s2=s.substring(0,j);
                        
                        k=Integer.parseInt(s1+s2);
                        if(k>i&&k<=b&&!stat)
                        {
                            c++;
                            
                        }
                        if(s1.equals(s2))
                        stat=true;
                    }
                }
                
            }
            out.println("Case #"+test+": "+c);
        }
        out.flush();
        System.exit(0);
    } 
}
