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.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class Dancers {

	public void solve() throws FileNotFoundException {
		Scanner in = new Scanner(new File("C-small-attempt1.in"));
		PrintWriter out = new PrintWriter("C-small-attempt1.out");

		int testN = in.nextInt();

		for (int i = 1; i <= testN; i++) {
			out.print("Case #" + i + ": ");
			int a = in.nextInt();
			int b = in.nextInt();
			int recycled = 0;
			StringBuilder sb;

			if (b > 9) {
				for (int x = a; x <= b; x++) {
					sb = new StringBuilder(Integer.toString(x));

					for (int y = 0; y < sb.length() - 1; y++) {
						int v = backToFront(sb);

						recycled += isRecycled(v, x, b);
					}

				}

			}
			out.println(recycled);
		}

		in.close();
		out.close();

	}

	public int backToFront(StringBuilder sb) {

		char c = sb.charAt(sb.length() - 1);

		sb.deleteCharAt(sb.length() - 1);

		sb.insert(0, c);

		int x = Integer.parseInt(sb.toString());

		return x;
	}

	public int isRecycled(int v, int x, int b) {
		int r = 0;

		if (v > x && v <= b)
			for (int i = x; i <= b; i++) {
				if (v == i)
					r++;
			}

		return r;
	}

	public static void main(String[] args) throws FileNotFoundException {
		new Dancers().solve();
	}
}