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)
   {
      new C(new Scanner(System.in));
   }

   ArrayList<Integer> makeNice(int v)
   {
      ArrayList<Integer> vs = new ArrayList<Integer>();
      while (v > 0)
      {
         vs.add(v%10);
         v = v/10;
      }
      return vs;
   }

   int changeBack(ArrayList<Integer> val)
   {
      int res = 0;
      int u=1;
      for (int v : val)
      {
         res += v*u;
         u = u*10;
      }
      return res;
   }

   public C(Scanner in)
   {
      int tc = 1;
      int T = in.nextInt();
      while (T-->0)
      {
         int A = in.nextInt();
         int B = in.nextInt();
         int res = 0;
         for (int val=A; val<=B; val++)
         {
            TreeSet<Integer> ts = new TreeSet<Integer>();
            //System.out.println(val);
	//System.out.print(val+":");
	    ArrayList<Integer> vs = makeNice(val);
            for (int u=0; u<vs.size(); u++)
            {
               //System.out.println(vs);
	       if (vs.get(vs.size()-1) != 0)
               {
                  int nv = changeBack(vs);
                  if (nv > val && nv <= B)
                     ts.add(nv);
               }
               Collections.rotate(vs,1);
            }
	    //System.out.println(ts);
            res += ts.size();
	//	System.out.println(ts);
         }
         System.out.printf("Case #%d: %d%n", tc++, res);
      }
   }
}
