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.PrintWriter;
import java.util.HashMap;
import java.util.Scanner;


public class C {

	
	
	
	public static void main(String[] args)throws Exception {
		Scanner sc = new Scanner(new File("C-small-attempt1.in"));
		PrintWriter pw = new PrintWriter(new File("outputC.out"));
		int n = sc.nextInt();
		for (int i = 0; i < n; i++) {
			int min = sc.nextInt();
			int max = sc.nextInt();
			long conteo=0;		
			for (int j = min; j <= max; j++) {
				conteo+=contarReps(j,min,max);
			}
			pw.println("Case #"+(int)(i+1)+": "+(int)(conteo/2));
		}
		pw.close();
	}
	
	static long contarReps(int num,int min,int max){
		StringBuffer strNum = new StringBuffer(""+num);
		StringBuffer strNumO = new StringBuffer(""+num);
		HashMap<String,String> mapa = new HashMap();
		mapa.put(""+num,""+num);
		String str;
		int rev;
		long count=0;
		for (int i = 0; i < strNum.length()-1; i++) {
			strNum.append(strNum.charAt(0));
			strNum.deleteCharAt(0);
			rev = Integer.parseInt(strNum.toString());
			str = strNum.toString();
			if(mapa.get(str)==null){
				mapa.put(str, str);
				if(rev>=min && rev<=max && rev!=num)
					count++;
			}
		}
		return count;
	}
	
	static int compare(StringBuffer bf1, StringBuffer bf2){
		for (int i = 0; i < bf1.length(); i++) {
			if(bf1.charAt(i)>bf2.charAt(i)){
				return 1;
			}else if(bf1.charAt(i)<bf2.charAt(i)){
				return -1;
			}
		}
		return 0;
	}
}
