import java.io.*;
import java.util.*;

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package codejamc;

import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.*;
/**
 *
 * @author usuario
 */
public class CodejamC {

    /**
     * @param args the command line arguments
     */
    public static int fun(int a,int b,int i){
      int cont=0,n=0,mod,res=i;
      boolean flag;
      String num=i+"";
      String aux;
      int tmp;
      tmp=num.length();
      while(n<tmp-1){
        flag=false;  
        n++;
        if(res<Math.pow(10,tmp-1))
         flag=true;
        mod=res%10;
        num=""+res;
        if(flag){
             num="0"+res;
        }    
        aux=""+mod;
        aux+=num.substring(0,num.length()-1);
        res=Integer.parseInt(aux);
        
        if(res>i && res<= b){
          cont++;
        }  
       }
      return cont;
    }
    public static void main(String[] args){ 
        int n,a,b,cont=0;
        try {
            System.setIn(new FileInputStream("file.in"));
        } catch (FileNotFoundException ex) {
            Logger.getLogger(CodejamC.class.getName()).log(Level.SEVERE, null, ex);
        }
        Scanner reader=new Scanner(System.in);
        n=reader.nextInt(); 
        for(int i=0;i<n;i++){
          cont=0;  
          a=reader.nextInt();
          b=reader.nextInt();
          for(int j=a;j<=b;j++){
            cont+=fun(a,b,j);  
          }
          System.out.println("Case #"+(i+1)+": "+ cont);
        }
      
    }
}
