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 jp.funnything.competition.util;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.apache.commons.io.FileUtils;
import org.apache.commons.io.FilenameUtils;
import org.apache.commons.io.IOUtils;

public class Packer {
    private static void add( final ZipArchiveOutputStream out , final File file , final int pathPrefix ) {
        if ( file.isDirectory() ) {
            final File[] children = file.listFiles();

            if ( children.length > 0 ) {
                for ( final File child : children ) {
                    add( out , child , pathPrefix );
                }
            } else {
                addEntry( out , file , pathPrefix , false );
            }
        } else {
            addEntry( out , file , pathPrefix , true );
        }
    }

    private static void addEntry( final ZipArchiveOutputStream out , final File file , final int pathPrefix , final boolean isFile ) {
        try {
            out.putArchiveEntry( new ZipArchiveEntry( file.getPath().substring( pathPrefix ) + ( isFile ? "" : "/" ) ) );

            if ( isFile ) {
                final FileInputStream in = FileUtils.openInputStream( file );
                IOUtils.copy( in , out );
                IOUtils.closeQuietly( in );
            }

            out.closeArchiveEntry();
        } catch ( final IOException e ) {
            throw new RuntimeException( e );
        }
    }

    public static void pack( final File source , final File destination ) {
        try {
            final ZipArchiveOutputStream out = new ZipArchiveOutputStream( destination );

            add( out , source , FilenameUtils.getPath( source.getPath() ).length() );

            out.finish();
            out.close();
        } catch ( final IOException e ) {
            throw new RuntimeException( e );
        }
    }
}
