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

class Factory implements TestCaseFactory {

	@Override
	public TestCase getInstance(int number) {
		return new RecycledNumbers(number);
	}
}

public class RecycledNumbers extends TestCase {

	int caseItem;

	int A;
	int B;

	int order;
	int power;

	int count;

	public RecycledNumbers(int caseItem) {
		this.caseItem = caseItem;
	}

	@Override
	public void readInput(BufferedReader in) throws IOException,
			MalformedInputFileException {
		final String str1 = in.readLine();
		final String[] tokens = str1.split("\\s");
		A = Integer.parseInt(tokens[0]);
		B = Integer.parseInt(tokens[1]);
	}

	private int pow(int x, int p) {
		int result = 1;
		for (int i = 0; i < p; i++) {
			result *= x;
		}
		return result;
	}

	private int shift(int x) {
		final int digit = x / power;
		final int remainder = x % power;
		return remainder * 10 + digit;
	}

	private int findNumberOfPairs(int x) {
		final Set<Integer> distint = new HashSet<Integer>();
		distint.add(x);
		int shifted = x;
		for (int i = 0; i < order; i++) {
			shifted = shift(shifted);
			if (shifted >= A && shifted < x) {
				return 0;	// we've already seen all these permutations
			} else if (shifted > x && shifted <= B) {
				distint.add(shifted);
			}
		}
		final int size = distint.size();
		return size * (size - 1) / 2;
	}

	@Override
	public void solve() {
		order = (int) Math.log10(A);
		power = pow(10, order);

		count = 0;
		for (int x = A; x < B; x++) {
			count += findNumberOfPairs(x);
		}
	}

	@Override
	public void writeOutput(PrintWriter out) {
		out.print("Case #" + (caseItem + 1) + ": ");
		out.print(count);
		out.print("\n");

	}

	public static void main(String[] args) throws IOException,
			MalformedInputFileException {
		new Processor().process(new Factory(), args[0], args[1]);
	}
}