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.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Set;



public class CRecycledNumbers {
	
	static int recycle(int a, int b) {
		System.out.println("-------------------------");
		System.out.println(a + " " + b);
		int count = 0;
		Set<String> used = new HashSet<String>();
		for(int i = a; i < b; ++i) {
			String s = Integer.toString(i);
			for(int j = 1; j < s.length(); ++j) {
				String pre = s.substring(0, j);
				String suf = s.substring(j);
				if(suf.startsWith("0")) continue;
				int c = Integer.parseInt(suf + pre);
				if(c <= b && c != i && i < c) {
					String p = i < c? (i + "-" + c) : (c + "-" + i);
					if(!used.contains(p)) {
						used.add(p);
						System.out.println(p);
						++count;
					}
				}
			}
			
		}
		
		return count;
	}
	
	public static void main(String[] args) throws NumberFormatException, IOException {
		String filename = "C-small-attempt0.in";
		BufferedReader r = new BufferedReader(new FileReader(filename));
		int n = Integer.parseInt(r.readLine());
		PrintWriter p = new PrintWriter("c.out");
		for(int i = 0; i < n; ++i) {
			String[] test = r.readLine().split(" ");
			int j = i + 1;
			p.println("Case #" + j + ": " +  recycle(Integer.parseInt(test[0]), Integer.parseInt(test[1])));
			
		}
		p.flush();
		p.close();
	}

}
