import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

package gcj;

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

public class RecycledNumbers {
	private String solve(Scanner in) {
		HashSet<Integer> set = new HashSet<Integer>();
		int A = in.nextInt();
		int B = in.nextInt();
		
		int result = 0;
		int numberLen = ((Integer)A).toString().length();
		
		int multiple = 1;
		for (int tt = 1; tt < ((Integer)A).toString().length(); tt++)
			multiple *= 10;
		
		for (int n = A; n < B; n++) {
			if (n / multiple >= 10) multiple *= 10;

			int m = n;
			int d = m % 10;
			m /= 10;
			
			int counter = 0;
			while (counter < numberLen - 1) {
				m += multiple*d;
				if (m > n && m <= B && !set.contains(m)) set.add(m);
				d = m % 10;
				m = m / 10;
				counter++;
			}
			
			result += set.size();
			set.clear();
		}
		return "" + result;
	}
	
	
	/**
	 * @param args
	 * @throws FileNotFoundException 
	 */
	public static void main(String[] args) throws FileNotFoundException {
	    Scanner in = new Scanner(new File("C:\\Users\\User\\Desktop\\dane\\data.in"));//C:\\Users\\User\\workspace\\GoogleCodeJam\\src\\gcj\\data"));//"));
	    PrintWriter out = new PrintWriter("C:\\Users\\User\\Desktop\\dane\\output");//C:\\Users\\User\\workspace\\GoogleCodeJam\\src\\gcj\\output");//"C:\\Users\\User\\Desktop\\dane\\output");
		
	    int T = in.nextInt();
	    in.nextLine();
	
        for (int i = 0; i < T; i++) {
            String s = "Case #" + (i + 1) + ": " + new RecycledNumbers().solve(in);
            out.println(s);
            System.out.println(s);
        }
        out.close();

	}
}
