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.*;
import java.io.*;


public class Recycle {

	public static void main(String[] args) throws IOException {
		BufferedReader f = new BufferedReader(new FileReader("C-small-attempt0.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("Recycle.out")));
		StringTokenizer st;
		
		st = new StringTokenizer(f.readLine());
		int T = Integer.parseInt(st.nextToken());
		
		int A, B;
		int numDigit;
		int temp, temp1, temp2, tempPow;
		int countRecycle;
		int[] result = new int[T];
		boolean[] set = new boolean[3000];
		for(int i = 0; i < T; i++) {
			for(int j = 0; j < 1000; j++)
				set[j] = false;
			
			st = new StringTokenizer(f.readLine());
			A = Integer.parseInt(st.nextToken());
			B = Integer.parseInt(st.nextToken());
			
			for(int j = A; j <= B; j++) {
				countRecycle = 1;
				if(set[j])
					continue;
				else {
					set[j] = true;
					numDigit = 1;
					while(j/(int)Math.pow(10, numDigit) != 0)
						numDigit++;
					for(int k = 1; k < numDigit; k++) {
						tempPow = (int) Math.pow(10, k);
						temp1 = j/tempPow;
						temp2 = j - temp1 * tempPow;
//						System.out.println("j: " + j + "\ntemp1: " + temp1 + "\ntemp2: " + temp2 + "\ntempPow: " + tempPow);

						if(temp2*10 / tempPow == 0)
							continue;
						temp = temp2 * (int) Math.pow(10, numDigit - k) + temp1;
						
//						System.out.println("j: " + j + "\ntemp1: " + temp1 + "\ntemp2: " + temp2 + "\ntemp:" + temp);
						
						if( (A <= temp) && ( temp <= B) && (!set[temp]) ) {
							set[temp] = true;
							countRecycle++;
						}				
					}
				}
				result[i] += countRecycle * (countRecycle - 1) / 2;
			}
		}
		
		for(int i = 0; i < T; i++) {
			out.println("Case #" + (i + 1) + ": " + result[i]);
		}
		
		out.close();
	}

}
