import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class Recycled {
	public static void main(String[] args) throws Exception{
		String inputFile = "C-small-attempt0.in";
		
		BufferedReader input = new BufferedReader(new InputStreamReader(new FileInputStream(inputFile)));
		BufferedWriter output = new BufferedWriter(new OutputStreamWriter(new FileOutputStream("output")));
		long num_cases = Long.parseLong(input.readLine());
		int current_case = 0;
		
		while (current_case < num_cases){
			current_case++;
			
			String[] fields = input.readLine().split(" ");
			int A = Integer.parseInt(fields[0]);
			int B = Integer.parseInt(fields[1]);
			int total = 0;
			
			for (int n = A; n < B; n++){
				for (int m = n+1; m <= B; m++){
					if (isRecycled(n,m)) total++;
				}
			}
			
			System.out.println("Case #" + current_case + ": " + total);
			output.write("Case #" + current_case + ": " + total + "\n");
		}
		output.close();
	}

	private static boolean isRecycled(int n, int m) {
		String sn = ""+n;
		String sm = ""+m;
		if (sn.length() != sm.length()) return false;
		int totaln = 0, totalm = 0;
		for (int i = 0; i < sn.length(); i++){
			totaln += sn.charAt(i);
			totalm += sm.charAt(i);
		}
		if (totaln != totalm) return false;
		for (int i = 0; i < sn.length()-1; i++){
			sm = sm.charAt(sm.length() - 1) + sm.substring(0, sm.length() - 1);
			if (sm.equals(sn)) return true;
		}
		return false;
	}
}


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

public class RecycledNumber {

    private int numCase;

    public void calc() throws FileNotFoundException, IOException {

        FileReader reader = new FileReader("D:/C-small-attempt0.in");
        BufferedReader bf = new BufferedReader(reader);

        FileWriter writer = new FileWriter("D:/output.txt");
        BufferedWriter bw = new BufferedWriter(writer);

        numCase = Integer.parseInt(bf.readLine());
        int n, m;
        for (int all = 1; all <= numCase; all++) {
            String[] inp = bf.readLine().split(" ");
            n = Integer.parseInt(inp[0]);
            m = Integer.parseInt(inp[1]);
            int count = 0;
            if (n < 10) {
                count = 0;
            } else if (n < 100) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(1) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            } else if (n >= 100 && n <= 999) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(2) + "" + temp.charAt(0) + "" + temp.charAt(1);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(1) + "" + temp.charAt(2) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            } else if (n >= 1000 & n <= 9999) {
                for (int i = n; i <= m; i++) {
                    String temp = i + "";
                    String rv = temp.charAt(1) + "" + temp.charAt(2) + "" + temp.charAt(3) + "" + temp.charAt(0);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(2) + "" + temp.charAt(3) + "" + temp.charAt(0) + "" + temp.charAt(1);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                    rv = temp.charAt(3) + "" + temp.charAt(0) + "" + temp.charAt(1) + "" + temp.charAt(2);
                    if (Integer.parseInt(rv) >= n && Integer.parseInt(rv) <= m && Integer.parseInt(rv) != i) {
//                        System.out.println("I : " + i + " RV : " + rv);
                        count++;
                    }
                }
            }
            System.out.println("Case #" + all + ": " + count / 2);
            bw.write("Case #" + all + ": " + count / 2+"\r\n");
        }
        bw.close();
        writer.close();
        bf.close();
        reader.close();
    }

    public static void main(String[] args) throws FileNotFoundException, IOException {
        RecycledNumber rn = new RecycledNumber();
        rn.calc();
    }
}