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.Map;

public class FileWrite {

    private static FileWrite fileWrite = new FileWrite();

    private FileWrite() {
    }

    public static FileWrite getInstance() {
        return fileWrite;
    }

    public final void write( final String fileName, final Map<Integer, String> output ) {
        FileWriter fstream = null;
        BufferedWriter out = null;
        try {
            // Create file 
            fstream = new FileWriter( fileName );
            out = new BufferedWriter( fstream );
            int size = output.size();
            for ( int i = 1; i <= size; i++ ) {
                final String outputStr =
                    new StringBuffer( "Case #" ).append( i ).append( ": " ).append( output.get( i ) ).toString();
                out.write( outputStr );
                if ( i != size ) {
                    out.newLine();
                }
            }

        } catch ( Exception e ) {//Catch exception if any
            System.err.println( "Error: " + e.getMessage() );
        } finally {
            //Close the output stream

            try {
                if ( out != null ) {
                    out.close();
                }
                if ( fstream != null ) {
                    fstream.close();
                }
            } catch ( IOException e ) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
}
