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.*;
import java.util.*;

public class RecycledNumbers {
	
	static int A, B;

	public static void main(String[] args) throws IOException {
		Kattio io = new Kattio(System.in, new FileOutputStream("recycle.out"));
		int T = io.getInt();
		for (int test = 1; test <= T; test++) {
			A = io.getInt();
			B = io.getInt();
			int res = 0;
			for (int i = A; i <= B; i++) {
				res += recycle(i);
			}
			io.println("Case #"+test+": "+res);
		}
		io.close();
	}
	
	static int recycle(int num) {
		int start = num;
		if (num/10 == 0) return 0;
		int m = 1;
		while (m <= num) {
			m*= 10;
		}
		m/= 10;
		int d = num/m;
		int res = 0;
		while (true) {
			num %= m;
			num *= 10;
			num += d;
			d = num/m;
			if (d != 0 && num > start && num <= B) res++;
			if (num == start) return res;
		}
	}

	static class Kattio extends PrintWriter {
	    public Kattio(InputStream i) {
		super(new BufferedOutputStream(System.out));
		r = new BufferedReader(new InputStreamReader(i));
	    }
	    public Kattio(InputStream i, OutputStream o) {
		super(new BufferedOutputStream(o));
		r = new BufferedReader(new InputStreamReader(i));
	    }

	    public boolean hasMoreTokens() {
		return peekToken() != null;
	    }

	    public int getInt() {
		return Integer.parseInt(nextToken());
	    }

	    public double getDouble() { 
		return Double.parseDouble(nextToken());
	    }

	    public long getLong() {
		return Long.parseLong(nextToken());
	    }

	    public String getWord() {
		return nextToken();
	    }

	    private BufferedReader r;
	    private String line;
	    private StringTokenizer st;
	    private String token;

	    private String peekToken() {
		if (token == null) 
		    try {
			while (st == null || !st.hasMoreTokens()) {
			    line = r.readLine();
			    if (line == null) return null;
			    st = new StringTokenizer(line);
			}
			token = st.nextToken();
		    } catch (IOException e) { }
		return token;
	    }

	    private String nextToken() {
		String ans = peekToken();
		token = null;
		return ans;
	    }
	}
}