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;
import java.io.File;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.Scanner;

public class C {
	static String BASEPATH = "x:\\gcj\\";
	static boolean LARGE = false;
	static String INPATH = BASEPATH + C.class.getSimpleName().charAt(0) + (LARGE ? "-large.in" : "-small-attempt0.in");
	static String OUTPATH = INPATH.substring(0, INPATH.length()-3) + new SimpleDateFormat("-HHmmss").format(new Date()) + ".out";
	
	static String INPUT = "";
	
	public void call()
	{
		int A = ni(), B = ni();
		int L = Integer.toString(A).length();
		int d = 1;
		for(int i = 0;i < L;i++)d *= 10;
		int ct = 0;
		int[] q = new int[L];
		for(int i = A;i <= B;i++){
			int p = 0;
			inner:
			for(int j = 10;j <= A;j*=10){
				int k = i%j*(d/j)+i/j;
				if(i < k && k <= B){
					for(int m = 0;m < p;m++){
						if(q[m] == k)continue inner;
					}
					q[p++] = k;
				}
			}
			ct += p;
		}
		out.println(ct);
	}
	
	Scanner in;
	PrintWriter out;
	int cas;
	
	public C(int cas, Scanner in, PrintWriter out)
	{
		this.cas = cas;
		this.in = in;
		this.out = out;
	}
	
	int ni() { return Integer.parseInt(in.next()); }
	long nl() { return Long.parseLong(in.next()); }
	double nd() { return Double.parseDouble(in.next()); }
	void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
	
	public static void main(String[] args) throws Exception
	{
		long start = System.currentTimeMillis();
		boolean real = INPUT.isEmpty();
		
		if(real){
			System.out.println("INPATH : " + INPATH);
			System.out.println("OUTPATH : " + OUTPATH);
		}
		Scanner in = real ? new Scanner(new File(INPATH)) : new Scanner(INPUT);
		PrintWriter out = real ? new PrintWriter(new File(OUTPATH)) : new PrintWriter(System.out);
		int n = in.nextInt();
		in.nextLine();
		
		for(int i = 0;i < n;i++){
			out.printf("Case #%d: ", i+1);
			new C(i+1, in, out).call();
			out.flush();
			if(real)System.err.println("case " + (i + 1) + " solved.\t");
		}
		
		long end = System.currentTimeMillis();
		System.out.println((end - start) + "ms");
		if(real){
			System.out.println("INPATH : " + INPATH);
			System.out.println("OUTPATH : " + OUTPATH);
		}
	}
}
