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.util.TreeSet;


public class SolveThread implements Runnable{
	
	private TreeSet<Integer> nbs;
	int pairs = 0, casenb;
	private ThreadDispatcher td;
	private int A, B;
	
	public SolveThread(int A, int B, int casenb, ThreadDispatcher td){
		nbs = new TreeSet<Integer>();
		this.A = A;
		this.B = B;
		for(int i = A; i <= B; i++){
			nbs.add(i);
		}
		this.casenb = casenb;
		this.td = td;
	}
	
	public void solve(){
		while(!nbs.isEmpty()){
			int n = nbs.first();
			findAndRemoveRecycledOf(n);
		}
	}

	private void findAndRemoveRecycledOf(int n) {
		nbs.remove((Integer)n);
		String nstr = "" + n;
		if(nstr.length() == 1)
			return;
		int nbInPair = 1;
		for(int i = 0; i < nstr.length()-1;i++){
			String sstr = shiftRight(nstr,i);
			sstr.replaceFirst("^0+(?!$)", "");
			int sn = Integer.parseInt(sstr);
			if(nbs.contains(sn)){
				nbInPair++;
				nbs.remove((Integer)sn);
			}
		}
		pairs += nbInPair * (nbInPair - 1) / 2;
	}

	private String shiftRight(String nstr, int i) {
		return nstr.substring(nstr.length() - 1 - i, nstr.length()) +  nstr.substring(0, nstr.length() - 1 - i);
	}

	@Override
	public void run() {
		solve();
		td.finish(this);
	}

}
