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)
  {
    Scanner in = new Scanner(new BufferedInputStream(System.in));
    int T = in.nextInt();
    for(int i=0; i <T;i++)
    {
      int A = in.nextInt();
      int B = in.nextInt();
      
      int x = A;
      int digits = 1;
      while(x >=10)
      {
        x = x/10;
        digits++;
      }
      //System.out.println("digits: " + digits);
      int sum = 0;
      int[] m = new int[digits-1];
      for(int k = 0; k < m.length; k++)
        m[k] = (k+1)*-1;
      
      for(int j = A; j < B; j++) 
      {
        //reset m 
        for(int k = 0; k < m.length; k++)
          m[k] = (k+1)*-1;
        
        //try every possible combination
        //count it if j < combo < B
        for(int k = 1; k < digits; k++)
        {
          int divisor = (int) Math.pow(10,k);
          int multiplier = (int)Math.pow(10,digits-k);
          int temp = (j%divisor)*multiplier + j/divisor;
          
          //if all digits the same skip
          String number = Integer.toString(temp);
          if(number.matches("^([0-9])\\1*$")) continue;
          
          if(temp > j && temp <= B) 
          {
            m[k-1] = temp;
            sum++;
          }
        }
        //if redundancy subtract
        Arrays.sort(m);
        for(int k = 1; k < m.length; k++)
          if(m[k] == m[k-1]) sum--;
      }
      System.out.printf("Case #%d: %d\n",i+1,sum);
    }
  }
}