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.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;

public class Recycled {
	
	public static boolean isRot(String a, String b){
		if(a.length()!=b.length())
			return false;
		if(!a.equals(b)){
			String c = b;
				for(int i=0;i<a.length();i++){
					c = c.charAt(c.length()-1) + "" + c.substring(0,c.length()-1);
					if(a.equals(c))
						return true;
				}
		}else return true;
		return false;
	}
	
	//public static boolean noEsta(Arra)
	
	public static void rots(String a, int in, int f, HashMap<Integer, HashSet<Integer>> mapa) {
		int num = Integer.parseInt(a);
		if(num<10)return;
		if(num>f || num<in)return;
		String c=a;
		for (int i = 0; i < a.length(); i++) {
			c = c.charAt(c.length() - 1) + "" + c.substring(0, c.length() - 1);
			//System.out.println(c);
			int cc= Integer.parseInt(c);
			if(cc>=in && cc<=f&& String.valueOf(cc).length()==a.length() && cc!=num){
//				if(mapa.containsKey(num) && !mapa.get(num).contains(cc)){
//					mapa.put(num,cc);
//					if(!mapa.containsKey(cc))
//						mapa.put(cc, new ArrayList<Integer>());
//					mapa.get(cc).add(num);
//				}
//				else{
//					mapa.put(num, new ArrayList<Integer>());
//					mapa.get(num).add(cc);
//					if(!mapa.containsKey(cc))
//						mapa.put(cc, new ArrayList<Integer>());
//					mapa.get(cc).add(num);
//				}
				if(!mapa.containsKey(num)){
					mapa.put(num, new HashSet<Integer>());
				}
				mapa.get(num).add(cc);
				if(!mapa.containsKey(cc))
					mapa.put(cc, new HashSet<Integer>());
				mapa.get(cc).add(num);
			}else{
				//System.out.println(cc);
			}
		}
	}

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new FileReader("/home/debian/Descargas/C-small-attempt0.in"));
//		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String input = br.readLine();
		int f = Integer.parseInt(input);
		for (int i = 0; i < f; i++) {
			HashMap<Integer,HashSet<Integer>> mapa = new HashMap<Integer, HashSet<Integer>>();
			input = br.readLine();
			int a = Integer.parseInt(input.split(" ")[0]);
			int b = Integer.parseInt(input.split(" ")[1]);
			for (int k = a; k <=b; k++) {
					//System.out.println("k " + k);
					//System.out.println("l " + l);
					rots("" + k, a,b,mapa);
			}
			int cont =0;
			for(int key: mapa.keySet()){
				cont+=mapa.get(key).size();
			}
			System.out.println("Case #" + (i + 1) + ": " + (cont>>1));
		}
	}

}
