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.util.*;

public class C {
		
	public static void main(String[] args){
		
		Scanner in = new Scanner(System.in);
		
		int T = in.nextInt();
		in.nextLine();
		
		for(int line = 1; line <= T; line++){ // loop through lines
			String numbers = in.nextLine();
			int spaceIndex = numbers.indexOf(' ');
			int lowerLimit = Integer.parseInt(numbers.substring(0, spaceIndex));
			int upperLimit = Integer.parseInt(numbers.substring(spaceIndex + 1));
			int numberOfDigits = spaceIndex;
			
			int pairs = 0;
			for(int swooper = lowerLimit; swooper < upperLimit; swooper++){
				for(int cycler = swooper + 1; cycler <= upperLimit; cycler++){
					// Convert to char array for manipulation
					char[] digits = Integer.toString(cycler).toCharArray();
					for(int offset = 1; offset < numberOfDigits; offset++){
						// Rotate
						char firstElement = digits[0];
						for(int i = 0; i < numberOfDigits - 1; i++){
							digits[i] = digits[i+1];
						}
						digits[numberOfDigits - 1] = firstElement;
						// Convert back to an int and compare
						int cycledCycler = Integer.parseInt(new String(digits));
						if(cycledCycler == swooper){
							//System.out.format("A match! %d and %d!\n", swooper, cycler);
							pairs++;
							break;
						}
					}
				}
			}
			
			System.out.format("Case #%d: %d\n", line, pairs);
		}
	}
}
