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.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class RecycledNumbers {

	public static void main(String[] args) throws IOException {
		String msg = "";
		BufferedReader br = null;
		String sCurrentLine = null;
		Map<String, String> map = new HashMap<String, String>();
		br = new BufferedReader(new FileReader("test"));
		sCurrentLine = br.readLine();
		int x = 0;
		if (sCurrentLine != null) {
			while ((sCurrentLine = br.readLine()) != null) {
				int sum = 0;
				msg = "";
				x++;
				int a = Integer.parseInt(sCurrentLine.split(" ")[0]);
				int b = Integer.parseInt(sCurrentLine.split(" ")[1]);
				for (int n = a; n < b; n++) {
					// for (int m = n + 1; m <= b; m++) {
					sum += fetchUniquePairs(n, a, b);
					// }
				}
				msg += "Case #" + x + ": " + sum;
				System.out.println(msg);
			}
		}

	}

	private static int fetchUniquePairs(int n, int a, int b) {
		List<Integer> uniquePairs = new ArrayList<Integer>();
		int dupN = n;
		int i = 0;
		while (dupN > 0) {
			dupN = dupN / 10;
			i++;
		}
		dupN = n;
		for (int j = 0; j < i - 1; j++) {
			int mod = dupN % 10;
			int add = mod * (int) Math.pow(10, i - 1);
			dupN = (dupN / 10);
			dupN += add;
			if (dupN <= b && dupN > n)
				if (!uniquePairs.contains(dupN))
					uniquePairs.add(dupN);
		}
		return uniquePairs.size();
	}
}
