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

public class C {

	static HashSet p = new HashSet();
	static int low;
	static int high;
	int count = 0;

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int no = sc.nextInt();

		for (int i = 1; i <= no; i++) {

			p.clear();
			low = sc.nextInt();
			high = sc.nextInt();

			for (int l = low; l <= high; l++) {
				recycle(l);
			}
			System.out.println("Case #" + i + ": " + p.size());

		}
	}

	public static void recycle(int no) {

		String s = Integer.toString(no);
		for (int i = 0; i < s.length(); i++) {
			String rec = s.substring(i) + s.substring(0, i);
			int r = Integer.parseInt(rec);
			if (r != no && r >= low && r <= high) {
				int min = Math.min(r, no);
				int max = Math.max(r, no);
				String a = Integer.toString(min) + "" + Integer.toString(max);
				p.add(a);

			}
		}

	}
}

import java.util.*;
import java.math.*;

public class recycledNumbers {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner scan = new Scanner(System.in);
		int numStrings = scan.nextInt();
		
		for(int i =1; i <= numStrings; i++){
			
			int lowerBound = scan.nextInt();
			int upperBound = scan.nextInt();
			int numDigits = Integer.toString(lowerBound).length();
			int ten = 10;
			
			int count = 0;
			for(int j = lowerBound; j <= upperBound ; j++){
				int temp = j;
				for(int k = 1; k <= numDigits; k++){
					int temp_rem = temp % ten;
					int temp_quot = temp /ten;
					int temp1 = temp_quot + (int )(Math.pow(ten, numDigits-1))*temp_rem;
					if (temp1 > j && temp1 <= upperBound){
						count = count + 1;
					}	
					temp = temp1;
					//System.out.println("\n" + j + " " + temp + " " + upperBound + " " + count);
				}
			}
			//System.out.println("LowerBound: " + lowerBound + "\n");
			//System.out.println("UpperBound: " + upperBound + "\n");
			//System.out.println("numDigits: " + numDigits + "\n");
			System.out.format("Case #%d: %d\n", i, count);
			
		}

	}

}
