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.awt.Point;
import java.io.File;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class C {
	public static Set<Point> set;

	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner(new File("input.in"));
		int n, a, b;
		int ans;
		n = in.nextInt();

		for (int tc = 1; tc <= n; tc++) {
			a = in.nextInt();
			b = in.nextInt();
			set = new HashSet<Point>();
			ans = finder(a, b) / 2;
			System.out.println("Case #" + tc + ": " + set.size() / 2);
			// System.out.println();
		}

	}

	public static int finder(int a, int b) {
		int temp;
		int ans = 0;
		for (int i = a; i <= b; i++) {
			for (int j = 1;; j++) {
				temp = moveDigits(i, j);
				if (temp == -1)
					break;
				if (temp != i && temp >= a && temp <= b) {
					// System.out.println("Output :" + i + "  " + temp);
					set.add(new Point(i, temp));
					ans++;
				}
			}

		}
		return ans;
	}

	public static int moveDigits(int num, int moveBy) {
		String s = Integer.toString(num);
		int size = s.length();
		if (moveBy >= s.length())
			return -1;
		s = s.substring(moveBy) + s.substring(0, moveBy);
		if (Integer.toString((Integer.parseInt(s))).length() != size)
			return 0;
		return Integer.parseInt(s);
	}

}
