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 recycledNumbers;

import java.awt.font.NumericShaper;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

public class Recycle {

	/**
	 * @param args
	 */
	public static void main(String[] args) {

		List<Limits> bLimits = null;
		BufferedReader br;

		// loading
		try {
			br = new BufferedReader(new InputStreamReader(new FileInputStream(args[0])));

			String line;
			int lCounter = 0;
			int numLines, low, upp;
			Limits ls;
			String[] bounds;

			while ((line = br.readLine()) != null) {
				if (lCounter == 0) {
					numLines = Integer.parseInt(line);
					bLimits = new ArrayList<Limits>(numLines);
					lCounter++;
				} else {
					bounds = line.split(" ");
					low = Integer.parseInt(bounds[0]);
					upp = Integer.parseInt(bounds[1]);
					ls = new Limits(low, upp);
					bLimits.add(ls);
				}
			}
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}

		// go
		int count = 1;
		for (Limits ls : bLimits) {
			calcRecycledPairs(ls.getLow(), ls.getUpp(), count);
			count++;
		}

	}

	private static void calcRecycledPairs(int low, int upp, int count) {

		Set<RecycledPair> recPairs = new HashSet<RecycledPair>();

		for (int num = low; num <= upp; num++) {

			int numRotations = Integer.toString(num).length() - 1;

			int originalNum = num;
			// recNums.add(originalNum);
			String numS = Integer.toString(num);
			String rotNumS;
			int rotNum;

			while (numRotations > 0) {

				rotNumS = rotate(numS);

				// System.out.println("[" + numS + ";" + rotNumS + "]");

				rotNum = Integer.parseInt(rotNumS);

				if (!(originalNum == rotNum) && !numS.equals(rotNumS) && rotNum >= low && rotNum <= upp
						&& !recPairs.contains(new RecycledPair(originalNum, rotNum))) {
					// System.out.println("*** (" + originalNum + "," + rotNum +
					// ")");
					recPairs.add(new RecycledPair(originalNum, rotNum));
				}

				numS = rotNumS;
				numRotations--;
			}
		}

		System.out.println("Case #" + count + ": " + recPairs.size());

	}

	private static String rotate(String num) {

		String last = Character.toString(num.charAt(num.length() - 1));
		char[] prefix = new char[num.length() - 1];
		num.getChars(0, num.length() - 1, prefix, 0);

		String s = last + new String(prefix);
		return s;
	}

}
