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

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}

import java.util.*; 
import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;
//SRM525
public class ggcjclarge {
	static boolean dp[] = new boolean[2000000];
	
	public static int store(int t, int N, int M){
		int answer = 0;
		
		if(t / 1000000 >= 1){// 7 digits
			int one = (t%1000000) * 10 + t/1000000;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
			int two = (t%100000) * 100 + t/100000;
			if(two <= M && two >= N && two != t && !dp[two] && two != one){
				answer++;
			}
			int three = (t%10000)*1000 + t/10000;
			if(three <= M && three >= N && three != t && !dp[three] && three != one && three != two){
				answer++;
			}
			int four = (t%1000)*10000 + t/1000;
			if(four <= M && four >= N && four != t && !dp[four] && four != one && four != two && four != three){
				answer++;
			}
			int five = (t%100)*100000 + t/100;
			if(five <= M && five >= N && five != t && !dp[five] && five != one && five != two && five != three && five != four){
				answer++;
			}
			int six = (t%10)*1000000 + t/10;
			if(six <= M && six >= N && six != t && !dp[six] && six != one && six != two && six != three && six != four && six != five){
				answer++;
			}
		}
		
		else if(t / 100000 >= 1){// 6 digits
			int one = (t%100000) * 10 + t/100000;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
			int two = (t%10000) * 100 + t/10000;
			if(two <= M && two >= N && two != t && !dp[two] && two != one){
				answer++;
			}
			int three = (t%1000)*1000 + t/1000;
			if(three <= M && three >= N && three != t && !dp[three] && three != one && three != two){
				answer++;
			}
			int four = (t%100)*10000 + t/100;
			if(four <= M && four >= N && four != t && !dp[four] && four != one && four != two && four != three){
				answer++;
			}
			int five = (t%10)*100000 + t/10;
			if(five <= M && five >= N && five != t && !dp[five] && five != one && five != two && five != three && five != four){
				answer++;
			}
		}
		
		else if(t / 10000 >= 1){// 5 digits
			int one = (t%10000) * 10 + t/10000;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
			int two = (t%1000) * 100 + t/1000;
			if(two <= M && two >= N && two != t && !dp[two] && two != one){
				answer++;
			}
			int three = (t%100)*1000 + t/100;
			if(three <= M && three >= N && three != t && !dp[three] && three != one && three != two){
				answer++;
			}
			int four = (t%10)*10000 + t/10;
			if(four <= M && four >= N && four != t && !dp[four] && four != one && four != two && four != three){
				answer++;
			}
		}
		else if(t / 1000 >= 1){// 4 digits
			int one = (t%1000) * 10 + t/1000;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
			int two = (t%100) * 100 + t/100;
			if(two <= M && two >= N && two != t && !dp[two] && two != one){
				answer++;
			}
			int three = (t%10)*1000 + t/10;
			if(three <= M && three >= N && three != t && !dp[three] && three != one && three != two){
				answer++;
			}
		}
		else if(t / 100 >= 1){ // 3digits
			int one = (t % 100) * 10 + t/100;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
			int two = (t % 10) * 100 + t/10;
			if(two <= M && two >= N && two != t && !dp[two] && two != one){
				answer++;
			}
		}
		else if(t / 10 >= 1){ // 2digits
			int one = (t % 10) * 10 + t/10;
			if(one <= M && one >= N && one != t && !dp[one]){
				answer++;
			}
		}
		else{ // 1 digit	
		}
		dp[t] = true;
		return answer;
	}
	
	public static void main(String[] args) throws FileNotFoundException { 
		
		int answer = 0;
		Scanner scan = new Scanner(System.in);
		int max = scan.nextInt();
		
		for(int i = 1; i <= max; i++){
			for(int j = 0; j < 2000000; j++){
				dp[j] = false;
			}
			int N = scan.nextInt();
			int M = scan.nextInt();
			for(int j = N; j < M; j++){
				answer = answer + store(j, N, M);
			}
			System.out.println("Case #" + i + ": " + answer);
			answer = 0;
		}
	} 
	
}
