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();
	}
}

package gcj2012.qr;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

public class RecycledNumbers {
	
	public static int count(int a, int b) {
		int r = 0, len, m;
		String sn, sm;
		Set<Integer> used = new HashSet<Integer>();
		for (int n = a; n < b; n++) {
			used.clear();
			sn = Integer.toString(n);
			len = sn.length();
			sn = sn + sn;
			for (int i = 1; i < len; i++) {
				if (sn.charAt(i) == '0') continue;
				sm = sn.substring(i, i + len);
				m = Integer.parseInt(sm);
				if ((m > n) && (m <= b) && !used.contains(m)) {
					r++;
					used.add(m);
				}
			}
		}
		return r;
	}

	public static void main(String[] args) throws NumberFormatException, IOException {
		if (args.length < 1 ) {
			System.out.println("File name not given");
			System.exit(1);
		}
		BufferedReader br = new BufferedReader(new FileReader(args[0]));
		int t = Integer.parseInt(br.readLine());
		for (int i = 1; i <= t; i++) {
			String[] test = br.readLine().split(" ");
			int a = Integer.parseInt(test[0]);
			int b = Integer.parseInt(test[1]);
			System.out.printf("Case #%d: %d\n", i, count(a, b));
		}
		br.close();
	}

}
