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

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * Created by IntelliJ IDEA.
 * User: Bunyod Xalilov
 * Date: 4/14/12
 * Time: 11:32 AM
 * To change this template use File | Settings | File Templates.
 */
public class TaskC {
    BufferedReader stdin;
    PrintWriter out;
    Integer n, iii, t;
    Integer[] nm, nn, mm;
    Boolean[] array;
    String str;
    List<Integer> listOfCases;


    public TaskC() {
        stdin = new BufferedReader(new InputStreamReader(System.in));
        out = new PrintWriter(System.out);
    }

    public void solve() throws IOException {
        Integer[] in = readInt(1);
        n = in[0];
        nn = new Integer[n];
        mm = new Integer[n];
        array = new Boolean[1000001];
        listOfCases = new ArrayList<Integer>();
        Arrays.fill(array, true);
        for (int i = 0; i < n; i++) {
            nm = readInt(2);
            nn[i] = nm[0];
            mm[i] = nm[1];
        }

        for (int i = 0; i < n; i++) {
            iii = 0;
            for (int j = nn[i]; j <= mm[i]; j++) {
                str = String.valueOf(j);
                for (int k = 1; k < str.length(); k++) {
                    StringBuffer sb = new StringBuffer();
                    sb.append(str.substring(k, str.length()));
                    sb.append(str.substring(0, k));
                    if (!sb.toString().startsWith("0")) {
                        t = Integer.parseInt(sb.toString());
                        if (array[t] && (j < t && t <= mm[i])) {
                            array[t] = false;
                            iii++;
                        }
                    }
                }
                Arrays.fill(array, true);
            }
            out.println("Case #" + (i + 1) + ": " + iii);
        }

        out.flush();
    }

    public Integer[] readInt(int size) throws IOException {
        Integer[] result = new Integer[size];
        String[] params = stdin.readLine().split(" ");
        for (int i = 0; i < size; i++) {
            result[i] = Integer.parseInt(params[i]);
        }
        return result;
    }

    public static void main(String[] args) throws IOException {
        TaskC obj = new TaskC();
        obj.solve();
        obj.stdin.close();
        obj.out.close();
    }
}
