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 fixjava;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Iterator;

/**
 * Iterator that iterates over the lines of the file and then closes it after the last line has been read.
 * 
 * e.g.
 * 
 * <code>
 * 
 * for (String line : new FileLineIterator("in.txt"))
 *     System.out.println(line);
 * 
 * for (NumberedLine nl : new FileLineIterator("in.txt").withLineNumbers())
 *     System.out.println(nl.getLineNum() + " " + nl.getLine());
 *     
 * </code>
 */
public class FileLineIterator implements Iterable<String>, Iterator<String> {

	private BufferedReader reader;
	String nextLine = null;
	boolean nextLineAlreadyFetched = false;
	private int lineNum = -1;

	// ------------------------------------------------------------------------------------------

	/**
	 * Construct an iterator that iterates over the lines of the file and then closes it after the last line has been read.
	 * 
	 * e.g. for (String line : new FileLineIterator("in.txt")) System.out.println(line);
	 * 
	 * @throws IllegalArgumentException
	 *             on any I/O exception, so you can use this directly in foreach loops.
	 */
	public FileLineIterator(String filename) {
		this(new File(filename));
	}

	/**
	 * Construct an iterator that iterates over the lines of the file and then closes it after the last line has been read.
	 * 
	 * e.g. for (String line : new FileLineIterator(file)) System.out.println(line);
	 * 
	 * @throws IllegalArgumentException
	 *             on any I/O exception, so you can use this directly in foreach loops.
	 */
	public FileLineIterator(File file) {
		try {
			reader = new BufferedReader(new FileReader(file), 1024 * 1024);
		} catch (FileNotFoundException e) {
			throw new IllegalArgumentException(e);
		}
	}

	@Override
	public Iterator<String> iterator() {
		return this;
	}

	// ------------------------------------------------------------------------------------------

	private String getNextLine(boolean consume) {
		if (!nextLineAlreadyFetched) {
			try {
				nextLine = reader.readLine();
				lineNum++;
				nextLineAlreadyFetched = true;
				if (nextLine == null)
					// Close reader after last line has been read
					reader.close();
			} catch (IOException e) {
				if (reader != null)
					try {
						reader.close();
					} catch (Exception e2) {
					}
				throw new IllegalArgumentException(e);
			}
		}
		String retVal = nextLine;
		if (consume) {
			nextLine = null;
			nextLineAlreadyFetched = false;
		}
		return retVal;
	}

	/** Return the current zero-indexed line number -- only returns the correct line number after a call to hasNext() or next() */
	public int getLineNum() {
		return lineNum;
	}

	@Override
	public boolean hasNext() {
		return getNextLine(false) != null;
	}

	@Override
	public String next() {
		return getNextLine(true);
	}

	@Override
	public void remove() {
		getNextLine(true);
	}

	// ------------------------------------------------------------------------------------------

	public class NumberedLine {
		String line;
		int lineNum;

		public NumberedLine(String line, int lineNum) {
			this.line = line;
			this.lineNum = lineNum;
		}

		public String getLine() {
			return line;
		}

		public int getLineNum() {
			return lineNum;
		}
	}

	/** Return an Iterable<NumberedLine> that includes the line number with each line */
	public Iterable<NumberedLine> withLineNumbers() {
		final FileLineIterator fileLineIter = this;
		return new Iterable<NumberedLine>() {
			@Override
			public Iterator<NumberedLine> iterator() {
				return new Iterator<NumberedLine>() {
					@Override
					public void remove() {
						fileLineIter.remove();
					}

					@Override
					public NumberedLine next() {
						String line = fileLineIter.next();
						int lineNum = fileLineIter.getLineNum();
						return new NumberedLine(line, lineNum);
					}

					@Override
					public boolean hasNext() {
						return fileLineIter.hasNext();
					}
				};
			}
		};
	}
}
