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.IOException;
import java.io.PrintWriter;
import java.io.RandomAccessFile;
import java.util.Hashtable;

public class codejamb {

	/**
	 * @param args
	 * @throws IOException
	 * @throws NumberFormatException
	 */
	public static void main(String[] args) throws Exception {
		RandomAccessFile r = new RandomAccessFile("testcase.txt", "r");
		PrintWriter p = new PrintWriter("out.txt");
		int t = Integer.parseInt(r.readLine());
		for (int i = 1; i <= t; i++) {
			String[] line = (r.readLine()).split(" ");
			int a = Integer.parseInt(line[0]);
			int b = Integer.parseInt(line[1]);
			int count = countIt(a, b);
			p.println("Case #" + i + ": " + count);
		}
		p.close();

	}

	static int countIt(int a, int b) {
		int count = 0;
		for (int i = a; i <= b; i++) {
			for (int j = i + 1; j <= b; j++) {
				if (checkPair(i + "", j + "")) {
					count++;
				}
			}
		}
		return count;
	}

	static boolean checkPair(String x, String y) {
		if (x.length() == y.length() && isTheSame(x, y)) {
			for (int i = x.length() - 1; i >= 0; i--) {
				String sub = x.substring(i);
				// String sub2 = y.substring(0, sub.length());
				String newStr = sub + x.substring(0, i);
				if (newStr.equalsIgnoreCase(y))
					return true;
			}
			return false;
		} else {
			return false;
		}
	}

	static boolean isTheSame(String x, String y) {
		char[] xArr = x.toCharArray();
		char[] yArr = y.toCharArray();
		for (int i = 0; i < xArr.length; i++) {
			for (int j = 0; j < yArr.length; j++) {
				if (xArr[i] == yArr[j]) {
					xArr[i] = 0;
					yArr[j] = 0;
					break;
				}
			}
		}
		for (int i = 0; i < yArr.length; i++) {
			if (yArr[i] != 0 || xArr[i] != 0)
				return false;
		}
		return true;
	}

}
