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.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Scanner;

public class PC {

    private static int[] div = {10, 100, 1000, 10000, 100000, 1000000};

    public static void main(String[] args) throws FileNotFoundException {
        if (args.length != 1) {
            System.exit(1);
        }
        File inFile = new File(args[0]);
        Scanner sc = new Scanner(inFile);
        int T = sc.nextInt();
        try (PrintWriter out = new PrintWriter("out.txt")) {
            for (int i = 1; i <= T; i++) {
                int A = sc.nextInt(), B = sc.nextInt(), count = 0, maxPow = 0;
                for (int j = 0; j < 6; j++) {
                    if (A / div[j] == 0) {
                        maxPow = j - 1;
                        break;
                    }
                }
                int[] prevFound = new int[2000000];
                for (int j = A; j <= B; j++) {
                    int pow = 0;
                    while (true) {
                        int numFront = j / div[pow];
                        if (numFront == 0) {
                            break;
                        }
                        int numBack = j % div[pow];
                        int newNum = numBack * div[maxPow - pow] + numFront;
                        if (j < newNum && A <= newNum && newNum <= B && prevFound[newNum - 1] < j) {
                            prevFound[newNum - 1] = j;
                            count++;
                        }
                        pow++;
                    }
                }
                out.println("Case #" + i + ": " + count);
            }
        }
        System.out.println("Completed!");
    }
}