import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.io.*;
import java.util.*;
public class C

{
     BufferedReader read;
     BufferedWriter write;
    public static void main(String args[])
    {
        try {
            new C().init("C-large");
        } catch (Exception ex) {
               System.out.println("error occured  "+ex);
          //  Logger.getLogger(Sample.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
     void init(String name) throws Exception
    {

        
        read=new BufferedReader(new FileReader(new File(name+".in")));
        write=new BufferedWriter(new FileWriter(new File(name+".out")));
        
        
          String x="";


            try {
                x = read.readLine();
               int n = Integer.parseInt(x);
              for(int i=0;i<n;i++)
                 {
              //    long t=new Date().getTime();
                   x = read.readLine();
              //     System.out.println("\n   time  "+t+"    "+(new Date().getTime()));
                   result(x, i);
                }
                write.flush();
                write.close();
                read.close();

               // System.out.println(a+"    "+b);
                }

             catch (Exception ex) {
                 System.out.println("error occured  "+ex);

               System.exit(0);
            }


      }
   //  TreeSet<Integer>tree;

void result(String x,int j) throws Exception
{
         //    tree=new TreeSet<Integer>();
             String ss[]=x.split(" ");
                int a=Integer.parseInt(ss[0].trim());
                int b=Integer.parseInt(ss[1].trim());
            //    System.out.println(a+"   "+b);
                int count=0;
                for(int i=a;i<=b;i++)
                {

                       // tree.add(i);
                        count+=count(i,a,b);
                     
                   
                }
                System.out.println("Case #"+(j+1)+": "+count);
               write.write("Case #"+(j+1)+": "+count+"\n");
}

int count(int p,int a,int b)
    {
    TreeSet<Integer>t=new TreeSet<Integer>();
    
   
    String s=""+p;
    s=s.trim();
    int l=s.length();
    for(int i=1;i<l;i++)
    {
        if(s.charAt(i)=='0')continue;
        int p1=Integer.parseInt(s.substring(i)+s.substring(0, i));
        if(p<p1&&p1<=b&&p1>=a)
        {
        //    System.out.print("\t"+p+"  "+p1);
            t.add(p1);
        }
    }
    return t.size();
}

}
