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.*;

public class Recycle {
	public static void main(String args[]) {
		try {
			InputStreamReader inReader = new InputStreamReader(new FileInputStream("input.txt"));
			BufferedReader br = new BufferedReader(inReader);
			
			File out = new File("output.txt");
			Writer output = new BufferedWriter(new FileWriter(out));
			
			int amount = Integer.parseInt(br.readLine());
			
			for (int i=0; i < amount; i++) {
				output.write("Case #" + (i+1) + ": ");
				String line = br.readLine();
				
				int min = Integer.parseInt(line.split(" ")[0]);
				int max = Integer.parseInt(line.split(" ")[1]);
				
				int result = 0;
				int digits = 1;
				int tmp = max;
				
				while (tmp/10 > 0) {
					tmp /= 10;
					digits++;
				}
				
				int[] assist = new int[digits];
				for (int l=0; l < digits; l++)
					assist[l] = 0;
				
				for (int j=min; j <= max; j++) {
					int number = j;
					int counter = 0;
					for (int k=1; k < digits; k++) {
						int newNumber = (int) ((int) (number%Math.pow(10, k)) * Math.pow(10, digits-k) + (number/Math.pow(10, k)));
						if (newNumber > number && newNumber <= max) {
							for (int l=0; l < counter; l++) {
								if (assist[l] == newNumber)
									result--;
							}
							
							assist[counter++] = newNumber;
							result++;
						}
					}
				}
				
				output.write(result + "\n");
			}
			
			output.close();
		}
		
		catch (Exception e) {
			e.printStackTrace();
		}
	}
}