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();
    }
}

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

class RecycledNumbers {
    public static void main(String[] args)
        throws Exception {
        new RecycledNumbers().start();
    }

    void start()
        throws Exception {
        InputStreamReader is =
            new InputStreamReader(
                                  new FileInputStream("Input"));
        BufferedReader br = new BufferedReader(is);
        OutputStreamWriter os =
            new OutputStreamWriter(
                                   new FileOutputStream("Output"));
        BufferedWriter bw = new BufferedWriter(os);
        String line;
	int[] inputs;
        int test = 1;
        line = br.readLine();
        while ((line = br.readLine()) != null) {
	    String[] inp = line.split(" ");
            inputs = new int[inp.length];
            int i = 0;
            for (String s :  inp) {
                inputs[i++] = Integer.parseInt(s);
            }
	    System.out.print("Case #" + test + ": ");
            String toWrite = "Case #" + test++ + ": ";
            bw.write(toWrite, 0, toWrite.length());

	    int len = inp[0].length();
	    int first = Integer.parseInt(inp[0]);
	    int second = Integer.parseInt(inp[1]);
	    int result = 0;
    
	    for (int j = first; j < second; j++) {
		String str = Integer.toString(j);
		str += str;
		//System.out.println(str);
		//System.out.println(len);
		ArrayList<Integer> arr = new ArrayList<Integer>();
		for (int k = 1; k < len; k++) {
		    int x = Integer.parseInt(str.
					     substring(k, k+len));
		    
		    if (x <= second && x > j) {
			if (!arr.contains(new Integer(x))) {
			    arr.add(new Integer(x));
			    result++;
			}
			//System.out.println(j + " " + x);
		    }
		    //System.out.print(x + " ");
		}
	    }
	    System.out.println(result);
	    String res = Integer.toString(result);
            bw.write(res, 0, res.length());

	    bw.newLine();
	}
	br.close();
	bw.close();
    }
}