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 bsevero.codejam.qualification;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;


public class IOUtils {
	
	public static List<String> readFile(String fileName) {
		try {
			File file = new File(fileName);
			FileReader fileReader = new FileReader(file);
			BufferedReader bufferedReader = new BufferedReader(fileReader);
			
			List<String> fileLines = new ArrayList<String>();
			for(String line = bufferedReader.readLine(); line != null; line = bufferedReader.readLine()) {
				fileLines.add(line);
			}

			return fileLines;
		} catch(Exception e) {
			e.printStackTrace();
			return Collections.emptyList();
		}
	}
	
	public static void writeFile(String fileName, Map<Integer, String> casesResult) {
		try {
			File file = new File(fileName);
			if(file.exists()) {
				file.delete();
			}
			file.createNewFile();
			FileWriter fileWriter = new FileWriter(file);
			PrintWriter printWriter = new PrintWriter(fileWriter);

			
			StringBuffer result = new StringBuffer();
			
			for(int i = 1; i <= casesResult.size(); i++) {
				result.append("Case #" + i + ": " + casesResult.get(i) + "\n");
			}
			printWriter.print(result.toString().substring(0, result.length() - 1));
			
			printWriter.close();
			fileWriter.close();
		} catch(Exception e) {
			e.printStackTrace();
		}
	}

	
}
