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.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;


	public class Main_c_new {
		public static void main(String[] args) throws Exception{
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			int cases=Integer.parseInt(in.readLine());
			for(int i=1;i<=cases;i++)
			{
				int count = 0;
				String line = in.readLine();
				String parts[] = line.split(" ");
				int a = Integer.parseInt(parts[0]);
				int b = Integer.parseInt(parts[1]);
				for(int j=a;j<b;j++){
					int temp = j;
					int length = 0;
					for(int k=0;k<8;k++){
						length++;
						temp/=10;
						if(temp<=0){
							break;
						}
					}
					ArrayList<Integer> list = new ArrayList<Integer>();
					for(int k=1;k<length;k++){
						 
						int div = (int)Math.pow(10,k);
						int part1 = j/div;
						int part2 = j%div;
						if(part2 >= (int)(Math.pow(10, k-1))){
							int num = (part2*((int)Math.pow(10, length-k)))+part1;
							if(num>j && num<=b){
								int flag = 0;
								for(int l=0; l<list.size();l++){
									if(list.get(l) == num){
										flag = 1;
									}
								}
								
								if(flag == 0){
								count++;
								list.add(num);
								}
							}
						}
					}
						
					}

				System.out.println("Case #"+i+": "+count);
			}
		}
	}
