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.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;

public class C {

	public static void main(String[] args) throws IOException {
//		Scanner in = new Scanner(new File("in/C/test.in"));
		 Scanner in = new Scanner(new File("in/C/small.in"));
		// Scanner in = new Scanner(new File("in/C/big.in"));
//		BufferedWriter bw = new BufferedWriter(new FileWriter("out/C/test.out"));
		 BufferedWriter bw = new BufferedWriter(new FileWriter(
		 "out/C/small.out"));
		// BufferedWriter bw = new BufferedWriter(new FileWriter(
		// "out/C/big.out"));

		int cases = in.nextInt();
		for (int c = 1; c <= cases; c++) {
			int low = in.nextInt();
			int high = in.nextInt();
			int length = String.valueOf(low).length();
			int count = 0;
			if (length != 1) {
				int maxD = (int) Math.pow(10, length - 1);
				System.err.println("Case " + c + ": Maximum " + maxD);
				for (int k = 1; k < length; k++) {
					int playingWith = (int) Math.pow(10, k);
					int m = (int)Math.pow(10,length-k);
					System.err.println("Playing with " + playingWith);
					for (int j = low; j < high; j++) {
						int first = j / maxD;
						int toMoveFront = j%playingWith;
						int tmpFirst = toMoveFront / (playingWith/10);
						if(tmpFirst < first)
							continue;
						int recycled = toMoveFront * m + j /playingWith;
						if(recycled > high){
							int dif = playingWith-toMoveFront;
							j += dif;
						}else if(recycled > j){
							count++;
						}
					}
				}
			}
			bw.write("Case #" + (c) + ": " + count);
			System.err.println("Case #" + (c) + ": " + count);
			bw.newLine();
		}
		in.close();
		bw.flush();
		bw.close();
	}
}
