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.*;

public class template {
	public static void main(String[] args) throws IOException {		
		StreamTokenizer in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
		PrintWriter out = new PrintWriter(new OutputStreamWriter(System.out));
		//PrintWriter out = new PrintWriter("output.txt");
		
	
		
		in.nextToken(); int count = (int)in.nval;
		
		for(int c = 1 ; c <= count ; c++) {
			int rotations = 0;
			
			in.nextToken(); int a = (int)in.nval;
			in.nextToken(); int b = (int)in.nval;
			
			/*
			ignore 0
			1 = 0 to 9 
			2 = 10 to 99
			...
			7 = 1 000 000 to 9 999 999
			 */
			int[] min = {0, 0, 10, 100, 1000, 10000, 100000, 1000000};
			int[] max = {0, 9, 99, 999, 9999, 99999, 999999, 9999999};
			// set limits
			for(int i = 1 ; i <= 7 ; i++) {
				min[i] = Math.max(min[i], a);
				max[i] = Math.min(max[i], b);
			}
			
			for(int len = 2 ; len <= 7 ; len++) {
				int exp = (int) Math.pow(10, len-1);
				for(int i = min[len] ; i <= max[len] ; i++) {
					int r = i;
					for(int j = 0 ; j < len-1 ; j++) {
						r = r % exp * 10 + (r/exp);
						if (r == i) break;
						if (r > i && r <= max[len] && i != r) rotations++;
					}
				}
			}
			out.println("Case #" + c + ": " + rotations);
		}
		
		
		out.flush();
		out.close();
	}
}
