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.HashSet;
import java.util.Scanner;
import java.util.Vector;


class Pair
{
	public int low;
	public int high;
	
	public Pair(int l, int h)
	{
		low = l;
		high = h;
	}
	
	public boolean equals(Object o)
	{
		Pair other = (Pair)o;
		
		return other.low == low && other.high == high;
	}
	
	public int hashCode()
	{
		return low * 31 + high; 
	}
}

public class C {
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		new C();
	}
	
	public C()
	{
		Vector<Pair> pairs = new Vector<Pair>();
		HashSet<Pair> set = new HashSet<Pair>();
		
		int[] powers = new int[8];
		
		int ac = 1;
		for(int i = 0; i < 8; ++i)
		{
			powers[i] = ac;
			ac *= 10;
		}
		
		for(int currentNumber = 10; currentNumber < 10000; ++currentNumber)
		{
			String trick = "" + currentNumber;
			
			int length = trick.length();
			
			int[] digits = new int[trick.length()];
			int[] shuffle = new int[trick.length()];
			
			for(int c = 0; c < length; ++c)
			{
				int digit = trick.charAt(c) - '0';
				
				digits[c] = digit;
				shuffle[c] = digit;
			}
			
			for(int s = 1; s < length; ++s)
			{
				boolean atLeastOneLarger = false;
				
				
				for(int pos = 0; pos < length; ++pos)
				{
					int spos = (pos + s) % length;
					/* Check that position makes the shuffle larger. */
					if(shuffle[spos] < digits[pos])
					{
						break;
					}
					else if(shuffle[spos] > digits[pos])
					{
						atLeastOneLarger = true;
						break;
					}
				}
				
				if(atLeastOneLarger)
				{
					int secondNumber = 0;
					
					/* Generate the larger number. */
					for(int pos = 0; pos < length; ++pos)
					{
						int spos = (pos + s) % length;
						
						secondNumber += shuffle[spos] * powers[length - pos - 1];
					}
					
					if(secondNumber < 2000000 && secondNumber > currentNumber)
					{
						Pair newp = new Pair(currentNumber, secondNumber);
						
						if(!set.contains(newp))
						{
							pairs.add(newp);
							set.add(newp);
						}
						
					}
				}
			}
		}
		
		Scanner sc = new Scanner(System.in);
		
		int testCases = sc.nextInt();
		
		for(int testCase = 1; testCase <= testCases; ++testCase)
		{
			int A = sc.nextInt();
			int B = sc.nextInt();
			
			int lowIndex = binLow(A, pairs);
			int highIndex = binHigh(B, pairs);
			
			if(lowIndex == -1)
				lowIndex = 0;
			
			if(highIndex == -1)
				highIndex = 0;
			
			int ans = 0;
			for(int pair = lowIndex; pair <= highIndex; ++pair)
			{
				Pair p = pairs.elementAt(pair);
				
				if(p.low >= A && p.high <= B)
					ans++;
			}
			
			System.out.printf("Case #%d: %d\n", testCase, ans);
		}
		
		
	}

	private int binHigh(int b, Vector<Pair> pairs) {
		int low = 0;
        int high = pairs.size() - 1;
		
        int mid = (low + high)/2;
		
        while (true) {
        	int number = pairs.elementAt(mid).low;
            if (number == b || number < b) {
                low = mid+1;
                if (high < low)
                    return mid<pairs.size()-1?mid+1:-1;
            } else {
                high = mid-1;
                if (high < low)
                    return mid;
            }
            mid = (low + high)/2;
        }
	}

	private int binLow(int a, Vector<Pair> pairs) {
		int low = 0;
        int high = pairs.size() - 1;
		
        int mid = (low + high)/2;
        while (true) {
        	int number = pairs.elementAt(mid).low;
        	
            if (number == a || number > a) {
                high = mid-1;
                if (high < low)
                    return mid;
            } else {
                low = mid+1;
                if (high < low)
                    return mid<pairs.size()-1?mid+1:-1;
            }
            mid = (low + high)/2;
        }
	}
}
