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.*;
import java.util.*;
public class C {
  static int N = 2000001;
  static int[][] pair = new int[N][6];
  static int[] np = new int[N];

  public static void main (String[] args) throws IOException {
    BufferedReader in = new BufferedReader(new InputStreamReader(System.in));

	for (int i = 1; i <= 6; i++)
	  gen(i);
	gen(1000000, 2000000, 7);
	/*for (int i = 1; i < 1000; i++)
	  for (int j = 0; j < np[i]; j++)
	    System.out.println(i + " " + pair[i][j]);*/
	int T = Integer.parseInt(in.readLine());
	for (int t = 0; t < T; t++) {
	  StringTokenizer st = new StringTokenizer(in.readLine());
	  int A = Integer.parseInt(st.nextToken());
	  int B = Integer.parseInt(st.nextToken());
	  int count = 0;
	  for (int i = A; i <= B; i++)
	    for (int j = 0; j < np[i]; j++)
		  if (pair[i][j] <= B)
		    count++;
	  System.out.println("Case #"+(t+1)+": " + count);
	}
	in.close();
  }
  
  static void gen (int d) {
    gen(pow10(d-1), pow10(d)-1, d);
  }
  
  static void gen (int lb, int ub, int d) {
    for (int i = lb; i <= ub; i++) {
	  int n = i;
      for (int j = 0; j < d-1; j++) {
		n = (n%10)*lb+(n/10);
		if (n > i) {
		  boolean found = false;
		  for (int k = 0; k < np[i]; k++)
		  if (pair[i][k] == n)
		    found = true;
		  if (!found) {
		    pair[i][np[i]] = n;
		   np[i]++;
		  }
		}
      }
	}
  }
  
  static int pow10 (int n) {
    int res = 1;
	for (int i = 0; i < n; i++)
	  res *= 10;
	return res;
  }
}