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.io.File;
import java.io.PrintWriter;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class C {
	static long calc(long A, long B) {
		long d[] = new long[100];
		long res = 0;
		for (long a = A; a<=B; a++) {
			long t = a;
			int n = 0;
			while (t > 0) {
				d[n++] = (t % 10);
				t /= 10;
			}
			Set<Long> set = new HashSet<Long>(); 
			for (int i=1; i<n; i++) {
				if (d[i-1]==0) continue;
				long b = 0;
				for (int j=i-1; j>=0; j--)
					b = b*10 + d[j];
				for (int j=n-1; j>=i; j--)
					b = b*10 + d[j];				
				if (a < b && b <= B && !set.contains(b)) {
					res++;
					set.add(b);
				}
			}
		}
		return res;
	}
	public static void main(String[] args) throws Exception {
		/*System.out.println(calc(10, 40));
		System.out.println(calc(1, 9));
		System.out.println(calc(100, 500));
		System.out.println(calc(1111, 2222));
		for (int i =0; i<50; i++)
			System.out.println(calc(1000000, 2000000));*/
		Scanner scanner = new Scanner(new File("c.in"));
		int T = scanner.nextInt();
		PrintWriter pw = new PrintWriter(new File("c.out"));
		for (int i=0; i<T; i++) {
			pw.printf("Case #%d: ", i+1);
			long a = scanner.nextLong(),
					b = scanner.nextLong();
			pw.println(calc(a, b));
		}
		pw.close();
	}
}
