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){}
	}
}
/**
 * 
 */

/**
 * @author Mostafa
 *
 */
public class ReNumbersLarge {
	
	public static String traverse(String x, int index) {
		char[] m = x.toCharArray();
		int i;
		for (i=0; i<x.length(); i++) {
			m[i] = x.charAt(index);
			if (index == x.length()-1) {
				index = -1;
			}
			index++;
		}
		String t = new String(m);
		return t;
	}
	
	public static int renumber(int first, int last) {
		String[] test = new String[last-first+1];
		int i, j;
		int testc = 0;
		int count = 0;
		for (i = first; i<=last; i++) {
			String x = Integer.toString(i);
			test[testc] = x;
			testc++;
		}
		if (test[0].length() == 1) {
			count = 0;
		}
		else {
			for (i=0; i<test.length/2; i++) {
				for (j=1; j<test[i].length(); j++) {
					String s = traverse(test[i], j);
					int testme = Integer.parseInt(s);
					if (testme >= first && testme<= last && test[i].compareTo(s) != 0) {
						
						count++;
					}
				}
			}
		}
		return count;
	}
		
}
