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 qual;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;

public class C {

	public static int[] prepare(int m, int base, int k){
		int[] res = new int[m];
		for (int i = 0; i < m; i++){
			int rest = k % 10;
			k /= 10;
			k += rest * base;
			res[i] = k;
		}
		return res;
	}
	public static void main(String[] args) throws Exception{
		String in_file = "q/c/l_in.txt";
		String out_file = in_file.replace("_in.txt", "_out.txt");
		BufferedReader in = new BufferedReader(new FileReader(in_file));
		BufferedWriter out = new BufferedWriter(new FileWriter(out_file));
		
		int n = Integer.parseInt(in.readLine());
		for (int i = 1; i <= n; i++){
			String[] s = in.readLine().split(" ");
			int a = Integer.parseInt(s[0]);
			int b = Integer.parseInt(s[1]);

			int count = 0;
			int base = 1;
			int m = 0; 
			while (base * 10 <= a) {
				base *= 10;
				m++;
			}
			for (int k = a; k < b; k++){
				int[] prob = prepare(m, base, k);
				for (int p : prob){
					if (p > k && p <= b) count++;
				}
			}
			out.write("Case #" + i + ": " + count + "\n");
		}
		
		in.close();
		out.close();
	}

}
