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.File;
import java.util.*;

public class ProblemC {

	
	public static void main(String[] args) throws Exception  {

		Scanner sc = new Scanner(new File("C:\\C-small-attempt0.in"));
		//Scanner sc = new Scanner(System.in);
		int cases = Integer.parseInt(sc.nextLine().trim());
		for(int i = 0; i < cases; i++){
			int a = sc.nextInt();
			int b = sc.nextInt();
			System.out.println("Case #" + (i + 1) + ": " + solve(a,b));
		}
	}

	
	private static int solve(int a, int b) {
		int [][]vis = new int[b + 1][b + 1];
		int count = 0;
		
		for(int i = a; i <= b; i++){
			int []arr = getPair(i);
			
			for(int j : arr){
				if((j >= a) && (j <= b) && (i != j) && vis[i][j] != 1){
					vis[i][j] = 1;
					vis[j][i] = 1;
					//System.out.println(i + " " + j);
					count++;
				}
			}
		}
		return count;
	}


	private static int[] getPair(int i) {
		int []ret = new int[]{};
		
		String str = String.valueOf(i);
		if(str.endsWith("0")){
		}
		else if(i < 10){
		} else if (i < 100){
			int a1 = i %10;
			int a2 = i/10;
			int a3 = a1*10 + a2;
			ret = new int[]{a3};
		} else if (i <= 1000){
			int a1 = i % 10;
			int a2 = ((i - a1)/10) % 10;
			int a3 = i/100;
			
			int a4 = a1*100 + a3*10 + a2;
			int a5 = a2*100 + a1*10 + a3;
			
			ret = new int[]{a4,a5};
		}
		return ret;
	}
}
