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.FileReader;
import java.io.BufferedReader;
import java.io.IOException;
import java.util.Scanner;
import java.util.Locale;

public class NumberPairs {
	public static void main(String[] args) throws IOException {
		Scanner s = null;

		try {
			s = new Scanner(new BufferedReader(new FileReader("NumberPairs.in")));

			int N = s.nextInt();

			for (int i = 1; i <= N; i++) {
				int a = s.nextInt(), b = s.nextInt();
				System.out.println("Case #" + i + ": " + calculate(a, b));
			}
		} finally {
			if (s != null) {
				s.close();
			}
		}
	}

	static int calculate(int a, int b) {
		int result = 0;
		for (int i = a; i <= b; i++)
			for (int j = i; j <= b; j++)
				if (isPair(i,j)) result++;

		return result;
	}

	static boolean isPair(int x, int y) {
		if (x == y) return false;

		byte[] p1 = ("" + x).getBytes(), p2 = ("" + y).getBytes();
		int size = p1.length;
		
		for (int start = 0; start < size; start++) {
			for (int offset = 0; offset < size; offset++) {
				if (p1[offset] != p2[(start + offset) % size])
					break;

				if (offset == size - 1) {
					// System.out.println("Pair: " + x + " " + y);
					return true;
				}
			}
		}	

		return false;
	}
}
