package jp.funnything.competition.util;

import java.math.BigInteger;

/**
 * Utility for BigInteger
 */
public class BI {
    public static BigInteger ZERO = BigInteger.ZERO;
    public static BigInteger ONE = BigInteger.ONE;

    public static BigInteger add( final BigInteger x , final BigInteger y ) {
        return x.add( y );
    }

    public static BigInteger add( final BigInteger x , final long y ) {
        return add( x , v( y ) );
    }

    public static BigInteger add( final long x , final BigInteger y ) {
        return add( v( x ) , y );
    }

    public static int cmp( final BigInteger x , final BigInteger y ) {
        return x.compareTo( y );
    }

    public static int cmp( final BigInteger x , final long y ) {
        return cmp( x , v( y ) );
    }

    public static int cmp( final long x , final BigInteger y ) {
        return cmp( v( x ) , y );
    }

    public static BigInteger div( final BigInteger x , final BigInteger y ) {
        return x.divide( y );
    }

    public static BigInteger div( final BigInteger x , final long y ) {
        return div( x , v( y ) );
    }

    public static BigInteger div( final long x , final BigInteger y ) {
        return div( v( x ) , y );
    }

    public static BigInteger mod( final BigInteger x , final BigInteger y ) {
        return x.mod( y );
    }

    public static BigInteger mod( final BigInteger x , final long y ) {
        return mod( x , v( y ) );
    }

    public static BigInteger mod( final long x , final BigInteger y ) {
        return mod( v( x ) , y );
    }

    public static BigInteger mul( final BigInteger x , final BigInteger y ) {
        return x.multiply( y );
    }

    public static BigInteger mul( final BigInteger x , final long y ) {
        return mul( x , v( y ) );
    }

    public static BigInteger mul( final long x , final BigInteger y ) {
        return mul( v( x ) , y );
    }

    public static BigInteger sub( final BigInteger x , final BigInteger y ) {
        return x.subtract( y );
    }

    public static BigInteger sub( final BigInteger x , final long y ) {
        return sub( x , v( y ) );
    }

    public static BigInteger sub( final long x , final BigInteger y ) {
        return sub( v( x ) , y );
    }

    public static BigInteger v( final long value ) {
        return BigInteger.valueOf( value );
    }
}

import java.util.Scanner;
import java.io.*;

public class Displayer
{
    public static void main(String[] args) throws IOException
    {
        Scanner kb = new Scanner(new File("/Users/mbp13/Documents/Google Code Jam/GCJ_Q3/src/input"));
        PrintStream out = new PrintStream(new File("/Users/mbp13/Documents/Google Code Jam/GCJ_Q3/src/output_q3"));
        int testNum,A,B;
        String tmpStr,tmpStr2,cut1,cut2;
        int cnt,x;
        testNum = kb.nextInt();
        for(int i=0;i<testNum;i++)
        {
            A = kb.nextInt();
            B = kb.nextInt();
            cnt = 0;
            for(int j=A;j<=B;j++)
            {
                tmpStr = j+"";
                for(int k=1;k<tmpStr.length();k++)
                {
                    cut1 = tmpStr.substring(0,k);
                    cut2 = tmpStr.substring(k,tmpStr.length());
                    tmpStr2 = cut2 + cut1;
                    x = Integer.parseInt(tmpStr2);
                    if(x > j && x >= A && x <= B)
                    {
                        cnt++;
                        System.out.println(j + " " + tmpStr2);
                    }
                }
            }
            out.println("Case #"+(i+1)+": "+cnt);
        }
    }
}
