import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.io.*;
import java.util.*;
import java.math.*;

public class Main {

    public void solve() throws IOException {
        int tests = nextInt();
        HashSet<Long> hs = new HashSet<Long>();
        for (int test=1; test<=tests; test++) {
            out.print("Case #"+test+": ");
            int a = nextInt();
            int b = nextInt();
            int t = Integer.valueOf(a).toString().length();
            int dp = 1;
            for (int i=1; i<t; i++) dp *= 10;
            int res = 0;
            for (int i=a; i<=b; i++) {
                int x = i;
                for (int j=1; j<t; j++) {
                    int d = x%10;
                    x /= 10;
                    x = x+d*dp;
                    if (x>i && x>=a && x<=b) {
                        hs.add(x*100l*dp+i);
                        res++;
                    }
                   // out.println(i+" "+x);
                }
            }
            res = hs.size();
            out.println(hs.size());
            hs.clear();
        }
    }






    BufferedReader br;
    StringTokenizer st;
    PrintWriter out;

    public void run() {
        try {
            //br = new BufferedReader(new InputStreamReader(System.in));
            //out = new PrintWriter(System.out);
            br = new BufferedReader(new FileReader("input.txt"));
            out = new PrintWriter("output.txt");
            solve();
            br.close();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(123);
        }
    }

    String next() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            String s = br.readLine();
            if (s == null)
                return null;
            st = new StringTokenizer(s);
        }
        return st.nextToken();
    }

    double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    public static void main(String[] args) {
        new Main().run();
    }
}
