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 com.skidson.codejam;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class RecycledNumbers {
	private static final File inFile = new File("input");
	private static final File outFile = new File("output");

	public static void main(String[] args) throws IOException {
		BufferedReader in = new BufferedReader(new FileReader(inFile));
		BufferedWriter out = new BufferedWriter(new FileWriter(outFile));
		int numTests = Integer.parseInt(in.readLine());
		
		for (int x = 0; x < numTests; x++) {
			String[] params = in.readLine().split(" ");
			final int A = Integer.parseInt(params[0]);
			final int B = Integer.parseInt(params[1]);
			
			int y = 0;
			for (int n = A; n < B; n++) {
				for (int m = B; m > n; m--) {
					String left = String.valueOf(n);
					for (int i = 1; i < left.length(); i++) {
						int pivot = left.length()-i;
						int temp = Integer.parseInt(left.substring(pivot) + left.substring(0, pivot));
						// Repeating patterns will give us duplicate pairs, e.g. n = 1212
						if (temp == n)
							break;
						if (temp == m)
							y++;
					}
				}
			}
			out.write("Case #" + (x+1) + ": " + y + "\n");
		}
		out.flush();
		out.close();
	}
}
