import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

/**
 * 
 */
package code.google.codejam;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;

/**
 * @author sunilkumarp
 *
 */
public abstract class Template {
	
	int testcases = 0;
	
	int casePoniter = 0;
	
	PrintWriter writer = null;
	
	BufferedReader reader = null;
	
	String line = null;
	
	int linePointer = -1;
	
	int linePerTestCase = 1;
	
	char lastChar = '!';
	
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		try {
			Template template = (Template) Class.forName(args[1]).newInstance(); 
			template.start(args);
		} catch (Exception e) {
			System.out.println(e.getMessage());
			e.printStackTrace(System.out);
		}

	}



	/**
	 * @param args
	 */
	protected void start(String[] args) {
		InputStream io = null;
		OutputStream os = null;
		
		
		
		try {
			
			io = Template.class.getResourceAsStream(args[0]);
			reader = new BufferedReader(new InputStreamReader (io));
			os = new FileOutputStream(new File(args[0].substring(0, args[0].length() -2 )+ "out"));
			writer = new PrintWriter(os);
			testcases = Integer.valueOf(reader.readLine());
			
			solveProblem();
			
			
		} catch (Exception e) {
			System.out.println(e.getMessage());
			e.printStackTrace(System.out);
		} finally {
			try {
				writer.flush();
				writer.close();
			} catch (Exception e) {
				System.out.println(e.getMessage());
				e.printStackTrace(System.out);
			}

			try {
				reader.close();
			} catch (Exception e) {
				System.out.println(e.getMessage());
				e.printStackTrace(System.out);
			}

			try {
				io.close();
			} catch (Exception e) {
				System.out.println(e.getMessage());
				e.printStackTrace(System.out);
			}

			try {
				os.flush();
				os.close();
			} catch (Exception e) {
				System.out.println(e.getMessage());
				e.printStackTrace(System.out);
			}
		}
	}

	public void solveProblem() throws Exception {
		long sTime = System.nanoTime();
		for (;++casePoniter <= testcases;) {
			long sTimeCase = System.nanoTime();
			writeOutput(casePoniter, solveProblemForATestCase());
			System.out.println("Time taken for test case" + "[" + casePoniter + "]:" + (System.nanoTime() - sTimeCase));
		}

		System.out.println("Total time for all test cases:" + (System.nanoTime() - sTime));
	}
	
	protected Object solveProblemForATestCase() throws Exception {
		initializeTestCase();
		printInput();
		return doSolveProblem();
	}

	protected abstract Object doSolveProblem() throws Exception;

	protected abstract void printInput() throws Exception;

	protected abstract void initializeTestCase() throws Exception;

	protected void writeOutput (int caseNo, Object result) {
		String str = "Case #" + caseNo + ": " + result;
		System.out.println("==========" + str + "=============");
		writer.println(str);
	}
	
	public char readChar() throws IOException {
		return lastChar = (char)reader.read();
	}
	
	public char readCharFromLine() throws IOException {
		int length = line.length();
		
		if (linePointer >= length - 1) {
			throw new IllegalStateException("Line has already ended.");
		}
		
		return line.charAt(++linePointer);
	}
	
	public String readLine() throws IOException {
		line = reader.readLine();
		linePointer = -1;
		return line;
	}
	
	public int readNextInteger() {
		int val = 0;
		int length = line.length();
		
		if (linePointer >= length) {
			throw new IllegalStateException("Line has already ended.");
		}
		
		while(++linePointer < length) {
			if (Character.isDigit(lastChar = line.charAt(linePointer))) {
				val = val * 10 + Character.digit(lastChar, 10);
			} else {
				break;
			}
		}
		
		return val;
	}
	
}
