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

public class Recycle {

	private static HashMap<Integer, HashSet<Integer>> map = new HashMap<Integer, HashSet<Integer>>();
	private static HashSet<Integer> toSkip = new HashSet<Integer>();
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int T = reader.nextInt();
		for (int tc = 1; tc <= T; tc++) {
			int a = reader.nextInt();
			int b = reader.nextInt();
			long before = System.currentTimeMillis();
			int res = doit(a, b);
			System.out.printf("Case #%d: %d\n", tc, res);
			long after = System.currentTimeMillis();
//			System.out.println("time taken: " + (after - before));
		}
	}

	private static int doit(int a, int b) {
		int count = 0;
		HashSet<Integer> skip = new HashSet<Integer>(toSkip);
		for (int i = a; i <= b; i++) {
			if (skip.contains(i))
				continue;
			HashSet<Integer> arr = generate(i);
//			if(arr.size() > 1) {
//				map.put(i, arr);
//			}
			// System.out.println(i + " --> " +
			// Arrays.deepToString(arr.toArray()));
			int temp = 0;
			if (arr.size() > 1) {
				for (int x : arr) {
					if (x >= a && x <= b) {
						temp++;
						skip.add(x);
					}
				}
				count += temp * (temp - 1) / 2;
			}
//			System.out.println("not skipping " + i + " gen: " + arr.size()+ " " + (temp * (temp - 1) / 2));
		}
		return count;
	}

	private static HashSet<Integer> generate(int num) {
		if(map.containsKey(num)) {
			HashSet<Integer> list = map.get(num);
			return list;
		}
		HashSet<Integer> list = new HashSet<Integer>();
		String s = "" + num;
		list.add(num);
		int len = s.length();
		for (int i = 1; i < len; i++) {
			String temp = s.substring(i) + s.substring(0, i);
			// System.out.println("temp: " + temp);
			if (temp.charAt(0) == '0')
				continue;
			int x = Integer.parseInt(temp);
			if( x <= 2000000) {
				list.add(x);
			}
		}
		if(list.size() > 1) {
			map.put(num, list);
		} else {
			toSkip.add(num);
		}
		return list;
	}

}

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.PrintStream;
import java.util.Scanner;

//javac C.java && java C x.in x.out
public class C {
	public static void main(String[] args) throws FileNotFoundException {
		InputStream in = System.in;
		if(args.length>0)
			in = new FileInputStream(args[0]);
		PrintStream out = System.out;
		if(args.length>1)
			out = new PrintStream(args[1]);

		Solver s = new Solver(new Scanner(in),out);
		//Multiple case input
		s.cases();
		//Single case input
		//s.go();
	}
}

class Solver {
	Scanner in;
	PrintStream out;
	public Solver(Scanner scanner, PrintStream printStream) {
		in = scanner;
		out = printStream;
	}

	public void cases() {
		int numCases = in.nextInt();
		in.nextLine();
		for(int i=0;i<numCases;i++) {
			out.print("Case #"+(i+1)+": ");
			go();
		}
	}

	public void go() {
		int A = in.nextInt();
		int B = in.nextInt();
		int ans = 0;
		
		int mod = 1;
		int a = A;
		int digs = 0;
		while(a>0) {
			a/=10;
			mod*=10;
			digs++;
		}
		
		for(int n = A; n <= B; n++) {
			for(int m = n+1; m <= B; m++) {
				int nn=n;
				for(int i = 0; i < digs; i++) {
					nn=(nn+mod*(nn%10))/10;
					if(nn==m) {
						ans++;
						break;
					}
				}
			}
		}
		out.println(ans);
	}
}