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();
    }
}

package com.googlerese.file;

import java.io.*;
import java.util.HashMap;
import java.util.Map;

public class FileRead {

    private static FileRead instance = new FileRead();

    private FileRead() {
    }

    public static FileRead getInstance() {
        return instance;
    }

    public Map<Integer, String[]> read( final String fileName ) {
        FileInputStream fstream = null;
        DataInputStream in = null;
        BufferedReader br = null;
        Map<Integer, String[]> input = null;
        try {
            // Open the file that is the first 
            // command line parameter
            fstream = new FileInputStream( fileName );
            // Get the object of DataInputStream
            in = new DataInputStream( fstream );
            br = new BufferedReader( new InputStreamReader( in ) );
            String strLine;
            //Read File Line By Line
            int count = 0;
            while ( ( strLine = br.readLine() ) != null ) {
                // Print the content on the console
                if ( count == 0 ) {
                    input = new HashMap<Integer, String[]>( Integer.parseInt( strLine ) );
                } else {
                    System.out.println( count + " : " + strLine );
                    String[] arr = strLine.split( "\\s+" );
                    input.put( count, arr );
                }
                count++;
            }
        } catch ( Exception e ) {//Catch exception if any
            System.err.println( "Error: " + e.getMessage() );
        } finally {
            //Close the input stream
            try {
                if ( br != null ) {
                    br.close();
                }
                if ( in != null ) {
                    in.close();
                }
                if ( fstream != null ) {
                    fstream.close();
                }
            } catch ( IOException e ) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        return input;
    }
}
