package jp.funnything.competition.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;

import org.apache.commons.io.IOUtils;

public class QuestionReader {
    private final BufferedReader _reader;

    public QuestionReader( final File input ) {
        try {
            _reader = new BufferedReader( new FileReader( input ) );
        } catch ( final FileNotFoundException e ) {
            throw new RuntimeException( e );
        }
    }

    public void close() {
        IOUtils.closeQuietly( _reader );
    }

    public String read() {
        try {
            return _reader.readLine();
        } catch ( final IOException e ) {
            throw new RuntimeException( e );
        }
    }

    public BigDecimal[] readBigDecimals() {
        return readBigDecimals( " " );
    }

    public BigDecimal[] readBigDecimals( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigDecimal[] values = new BigDecimal[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigDecimal( tokens[ index ] );
        }

        return values;
    }

    public BigInteger[] readBigInts() {
        return readBigInts( " " );
    }

    public BigInteger[] readBigInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final BigInteger[] values = new BigInteger[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = new BigInteger( tokens[ index ] );
        }

        return values;
    }

    public int readInt() {
        final int[] values = readInts();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public int[] readInts() {
        return readInts( " " );
    }

    public int[] readInts( final String separator ) {
        final String[] tokens = readTokens( separator );

        final int[] values = new int[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Integer.parseInt( tokens[ index ] );
        }

        return values;
    }

    public long readLong() {
        final long[] values = readLongs();

        if ( values.length != 1 ) {
            throw new IllegalStateException( "Try to read single interger, but the line contains zero or multiple values" );
        }

        return values[ 0 ];
    }

    public long[] readLongs() {
        return readLongs( " " );
    }

    public long[] readLongs( final String separator ) {
        final String[] tokens = readTokens( separator );

        final long[] values = new long[ tokens.length ];
        for ( int index = 0 ; index < tokens.length ; index++ ) {
            values[ index ] = Long.parseLong( tokens[ index ] );
        }

        return values;
    }

    public String[] readTokens() {
        return readTokens( " " );
    }

    public String[] readTokens( final String separator ) {
        return read().split( separator );
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.HashMap;
import java.util.HashSet;


public class Number {
	public static int instinct(int a ){
		int b = a%10;
		int m = 0;
		while(a!=0){
			b = a%10;
			a = a/10;
			m++;
		}
		return m;
	}
	
	public static void main(String[] args) throws Exception{
		BufferedReader br = new BufferedReader(new FileReader("C-small-attempt0.in"));
		BufferedWriter bw = new BufferedWriter(new FileWriter("output.txt"));

		String line = "";
		line = br.readLine();
		int number = Integer.valueOf(line);
		for(int i = 1; i<= number; i++){
			line = br.readLine();
			String[] tokens = line.split(" ");
			int a = Integer.valueOf(tokens[0]);
			int b = Integer.valueOf(tokens[1]);
			int result = 0;
			for(int n = a; n<= b; n++){
				int m = instinct(n);

				HashSet<Integer> in = new HashSet<Integer>();
					for(int c = 1; c< m; c++){
						int po =(int) Math.pow(10,c);
						
						int tmp = (int) (Math.pow(10, m-c)*(n%po)+n/po);

						if(tmp >= a && tmp <=b){
							if(tmp > n){
			                    if(!in.contains(tmp)){
			                    	result++;
			                    	in.add(tmp);
			                    }
							}
						}
					}
			}
			bw.append("Case #"+i+": "+result);
			bw.newLine();
		}
		br.close();
		bw.close();
	}
}
