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.*;
import java.util.*;

public class C {

	public static void main(String[] args) throws IOException {
               	//variable initialization
                String inFile = args[0];
		String outFile = inFile.split("\\.")[0] + ".out";

                //file reading...
                BufferedReader reader = new BufferedReader(new FileReader(inFile));
                PrintWriter writer = new PrintWriter(new FileWriter(outFile));

		//get input data
		int T = Integer.valueOf(reader.readLine());
		for (int t = 0; t < T; t++) {
			String[] str_nums = reader.readLine().split(" ");
			int A = Integer.valueOf(str_nums[0]);
			int B = Integer.valueOf(str_nums[1]);
			int count = 0;
			// for (int i = 1; i < 5; i++) {
			// 	for (int j = i+1; j < 5; j++) {
			// 		for (int k = 0; k < 10; k++) {
			// 			if (k == i || k == j) continue;
			// 			int shift = 1;
			// 			int n = i*100 + k*10 + j;
			// 			int m = n % (int)Math.pow(10, shift) * (int)Math.pow(10, 3 - shift)
			// 			      + n / (int)Math.pow(10, shift); 	
			// 			count++;
			// 			System.out.print(n + "->" + m + ", ");

			// 			shift = 2;
			// 			n = i*100 + j*10 + k;
			// 			m = n % (int)Math.pow(10, shift) * (int)Math.pow(10, 3 - shift)
			// 			      + n / (int)Math.pow(10, shift); 	
			// 			count++;
			// 			System.out.print(n + "->" + m + ", ");
			// 			
			// 		}
			// 		System.out.println();
			// 	}
			// }
			int digits = String.valueOf(A).length();
			for(int i = A; i < B; i++) {
				//Set<Character> chars = new HashSet<Character>();
				//for (char c : String.valueOf(i).toCharArray()) chars.add(c);
				//if (chars.size() != digits) continue;
				Set<Integer> olds = new HashSet<Integer>();
				for (int shift = 1; shift < digits; shift++) {
					int n = i;
					int m = n % (int)Math.pow(10, shift) * (int)Math.pow(10, digits - shift)
					      + n / (int)Math.pow(10, shift); 	
					if (m < A || m > B || n >= m) continue;
					if (olds.contains(m)) continue;
					olds.add(m);
					count++;
					// if (t == 3) System.out.print(n + "->" + m + ", ");
				}
			}
			String result = "Case #" + (t+1) + ": " + count;
			writer.println(result);
			System.out.println(result);
		}
		reader.close();
		writer.close();		
	}
}
