import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.util.Scanner;
import java.io.OutputStream;
import java.io.IOException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import java.io.FileInputStream;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 * @author Prabu
 */
public class Main {
	public static void main(String[] args) {
		InputStream inputStream;
		try {
			inputStream = new FileInputStream("IO/C-small-attempt0.in");
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
		OutputStream outputStream;
		try {
			outputStream = new FileOutputStream("IO/C-small-attempt0.out");
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
		Scanner in = new Scanner(inputStream);
		PrintWriter out = new PrintWriter(outputStream);
		CJ2012QR_RecycledNumbers solver = new CJ2012QR_RecycledNumbers();
		int testCount = Integer.parseInt(in.next());
		for (int i = 1; i <= testCount; i++)
			solver.solve(i, in, out);
		out.close();
	}
}

class CJ2012QR_RecycledNumbers {
	public void solve(int testNumber, Scanner in, PrintWriter out) {
        int A = in.nextInt();
        int B = in.nextInt();

        if(B < 10) {
            out.printf("Case #%d: 0\n", testNumber);
            return;
        }

        boolean[] visited = new boolean[B-A+1];
        int nDigits = String.valueOf(A).length()-1;
        int cycleCount, pairCount, tempi;
        StringBuilder sb;
        pairCount = 0;
        for(int i = A; i <= B; i++) {
            if(visited[i - A])
                continue;

            sb = new StringBuilder(String.valueOf(i));
            sb.insert(0, sb.charAt(sb.length() - 1));
            sb.deleteCharAt(sb.length() - 1);
            tempi = Integer.parseInt(sb.toString());
            cycleCount = 0;
            while(i != tempi) {
                if(tempi >= A && tempi <= B && visited[tempi - A] == false) {
                    cycleCount++;
                    visited[tempi - A] = true;
                }

                sb.insert(0, sb.charAt(sb.length() - 1));
                sb.deleteCharAt(sb.length() - 1);
                tempi = Integer.parseInt(sb.toString());
            }

            pairCount += (cycleCount * (cycleCount + 1)) / 2;
        }
        out.printf("Case #%d: %d\n", testNumber, pairCount);
	}
}

