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.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.PrintWriter;
import java.util.Scanner;

public class Recycled implements Runnable {
    static final int MAX = 2000000;
    public void run(){
        try {
            Scanner in = new Scanner(new File("C-small-attempt0.in"));
            PrintWriter out = new PrintWriter(new File("c.out"));
            int testNum = in.nextInt();
            for (int test = 1; test <= testNum; test++) {
                //System.out.println("!!! new test");
                int a = in.nextInt();
                int b = in.nextInt();
                int p = 0;
                int k = 1;
                boolean[] u = new boolean[MAX + 1];
                while (a > k * 10) {
                    p++;
                    k *= 10;
                }
                long res = 0;
                for(int i = a; i <= b; i++) {
                    //System.out.println("in " + i);
                    if (u[i]) {
                        //System.out.println("  skipped");
                        continue;
                    }
                    u[i] = true;
                    if (i == k * 10) {
                        p++;
                        k *= 10;
                    }
                   // System.out.println("  p = " + p);
                    int ll = 1;
                    int ii = i;
                    for (int j = 0; j < p; j++) {
                        ii = (ii / 10) + (ii % 10) * k;
                        //System.out.println("  found " + ii);
                        if (a <= ii && ii <= b) {
                            if (u[ii]) continue;
                            //System.out.println("    ok");
                            u[ii] = true;
                            ll++;
                        }
                    }
                    //System.out.println(" ll = " + ll);
                    res += ll * (ll - 1) / 2;
                }
                out.println("Case #" + test + ": " + res);
            }
            out.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        new Recycled().run();
    }
}
