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.util.*;
import java.io.*;
import java.lang.Number;

public class number {
	public static void main(String[] args) throws FileNotFoundException {
		Scanner fileReader = new Scanner(new File("C-large.in"));
		PrintStream output = new PrintStream(new File("outputAwesome3.txt"));
		

		// Process file
		int repetitions = fileReader.nextInt();
		for(int i = 1; i <= repetitions; i++) {
			output.print("Case #" + i + ": ");
			int start = fileReader.nextInt();
			int stop = fileReader.nextInt();
			
			if (start < 10 || stop < 10) {
				output.println("0");
			} else {
				int digits = 0;
				int foo = start;
				while (foo != 0) {
					foo = foo / 10;
					digits++;
				}
				
				int count = 0;

				for(int j = start; j <= stop; j++) {
					String number = j + "";
					for(int k = 1; k < digits; k++) {
						// number = 10, k = 2
						String stuff = number.substring(1) + number.charAt(0);
						if(!stuff.equals(number)) {
							number = stuff;
							//System.out.println(number);
							if(Integer.parseInt(number) <= stop && Integer.parseInt(number) >= start){
								//System.out.println("yes");
								count++;
							}
						}
					}
				}
				output.println(count / 2);
			}
		}
	}
}