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();
    }
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package question3;

import com.sun.org.apache.xpath.internal.FoundIndex;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

/**
 *
 * @author karim
 */
public class Question3 {

    static Map<Pair, Integer> found = new HashMap<Pair, Integer>();

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        BufferedWriter out = new BufferedWriter(new FileWriter("output.out"));
        BufferedReader in = new BufferedReader(new FileReader("C-large.in"));
        int numOfcases = Integer.parseInt(in.readLine());
        for (int caseNum = 1; caseNum <= numOfcases; caseNum++) {
            found = new HashMap<Pair, Integer>();
            String input = in.readLine();
            Scanner s = new Scanner(input);
            int a = s.nextInt();
            int b = s.nextInt();
            long output = 0;
            if (b >= 10) {
                for (int currentNum = b; currentNum >= a; currentNum--) {
                    int temp = currentNum;
                    int divisor = 10;
                    while (temp / divisor != 0) {
                        int div = temp / divisor;
                        int reminder = temp % divisor;
                        divisor *= 10;
                        int newNumber = Integer.parseInt("" + reminder + div);
                        if(newNumber == currentNum)
                            break;
                        if (newNumber >= a && newNumber <= b && newNumber != currentNum) {
                            Pair p = new Pair(newNumber, currentNum);
                            if (!found.containsKey(p)) {
                                //System.out.println(currentNum + "  " + newNumber);
                                found.put(p, 1);
                                output++;
                            }
                        }

                    }

                }
            }
            out.write("Case #" + caseNum + ": " + output);
            out.newLine();
        }
        out.flush();
        out.close();
        in.close();
    }
}
