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;

public class RecycledNumbers {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int[] array = new int[n];
		for (int i = 0; i < n; i++) {
			int min = scan.nextInt();
			int max = scan.nextInt();

			int total = 0;
			for (int j = min; j <= max; j++)
				for (int k = j+1; k <= max; k++)
					if (isR(j, k))
						total++;
			array[i] = total;
		}
		for (int i = 1; i <= n; i++)
			System.out.println("Case #" + i + ": " + array[i - 1]);
	}

	private static boolean isR(int m, int n) { 
		if(m<10){
			return false;
		}
		else if(m<100){
			return isR(m,n,2);
		}
		else if(m<1000){
			return isR(m,n,3);
		}
		else if(m<10000){
			return isR(m,n,4);
		}
		else if(m<100000){
			return isR(m,n,5);
		}
		else if(m<1000000){
			return isR(m,n,6);
		}
		else if(m<10000000){
			return isR(m,n,7);
		}
		else return false;
	}

	private static boolean isR(int m, int n, int i) {
		boolean tf=false;
		for(int j=1;j<i;j++){
			int big=m/(int)Math.pow(10, j);
			int rem=m%(int)Math.pow(10, j);
			int mm=big+rem*(int)Math.pow(10, i-j);
			tf=tf||mm==n;
		}return tf;
	}
}
