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 ProblemB {

	/**
	 * @param args
	 * @throws FileNotFoundException 
	 */
	public static void main(String[] args) throws FileNotFoundException {
		// TODO Auto-generated method stub
		Scanner scanner = new Scanner(new File("/Users/phan/Downloads/C-small-attempt0.in"));
		PrintWriter pw = new PrintWriter("/Users/phan/Downloads/output");
		int t = scanner.nextInt();
		
		for (int i = 1; i <= t; i++) {
			int A = scanner.nextInt();
			int B = scanner.nextInt();
			
			int cnt = 0;
			
			for (int n = A; n <= B; n++) {
				int[] digits = new int[7];
				int tmp = n;
				int cntdigit = 0;
				while (tmp > 0) {
					digits[cntdigit++] = tmp % 10;
					tmp = tmp / 10;
				}
				
				int[] mm = new int[cntdigit];
				int cnt2 = 0;
				for (int j = 1; j < cntdigit; j++) {
					int m = 0;
					for (int k = j - 1; k >= 0; k--) 
						m = m * 10 + digits[k];
					for (int k = cntdigit - 1; k >= j; k--) 
						m = m * 10 + digits[k];
					
					if ( (n < m) && (m <= B) ) {
						
						boolean b = true;
					
						for (int l = 0; l < cnt2; l++)
							if (mm[l] == m)
								b = false;
						
						if (b) {
							cnt++;
							mm[cnt2++] = m;
							//System.out.println(n + " " + m);
						}
					}
					
				}

			}
			
			pw.println("Case #" + String.valueOf(i) + ": " + String.valueOf(cnt));
		}
		
		scanner.close();
		pw.close();

	}

}
