import java.util.Scanner;
import java.io.*;
import java.lang.Math;


public class C{
	public static int recycle(String str){
		String[] numbers = str.split(" ");
		int min = Integer.parseInt(numbers[0]);
		int max = Integer.parseInt(numbers[1]);
		int ret = 0;

		for(int i = min; i < max; i++){
			String num = i + "";
			int len = num.length();
			int k = i;
			for(int j = 1; j < len; j++){
				k = (k/10) + (int)java.lang.Math.pow(10.0,(double)(len-1))*(k%10);
				if (k > i && k <= max)
					ret++;
				else if(k == i)
					break;
			}
		}

		return ret;
	}

	public static void main(String[] args){
		Scanner sc = null;
		String next;
		int out;
		try{
			sc = new Scanner(new File("C-large.in"));
			int cases = Integer.parseInt(sc.nextLine());
			int current = 0;
			

			FileWriter fs = new FileWriter("output.txt");
			BufferedWriter buff = new BufferedWriter(fs);
			while(current < cases){
				next = sc.nextLine();
				current++;
				out = recycle(next);
				buff.write("Case #" + current + ": " + out + "\n");
			}
			buff.close();
		}
		catch(Exception ex){}
	}
}
import java.io.File;
import java.io.FileNotFoundException;
import java.util.HashMap;
import java.util.Scanner;

public class CodeJam2012Ex3 {
	public static void main(String arg[]) throws FileNotFoundException {
		File file = new File("C-large.in");
		String output;
		Scanner scanner = new Scanner(file);
		int numTestCases = scanner.nextInt();

		for (int i = 0; i < numTestCases; i++) {
			StringBuffer buffer = new StringBuffer("Case #" + (i + 1) + ": ");
			int A = scanner.nextInt();
			int B = scanner.nextInt();
			buffer.append(CodeJam2012Ex3.countPairs(A, B));
			if (i != numTestCases - 1) {
				buffer.append("\n");
			}
			output = buffer.toString();

			System.out.print(output);
		}

	}

	public static int countPairs(int A, int B) {
		int pairs = 0;
		HashMap<String, Boolean> map = new HashMap<String, Boolean>();

		for (int i = A; i <= B; i++) {

			String n = i + "";

			int len = n.length();
			for (int j = 1; j < len; j++) {
				String m = n.substring(len - j) + n.substring(0, len - j);
				int nNum = Integer.parseInt(n);
				int mNum = Integer.parseInt(m);
				if (nNum < mNum && n.length() == (mNum + "").length()
				&& mNum <= B && !map.containsKey((n + m))) {
					map.put(n + m, (Boolean) true);
					pairs++;
				}
			}
		}
		return pairs;

	}
}
