import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.HashMap;


public class RecycledNumbers {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		try {
			BufferedReader br = new BufferedReader(new FileReader("/Users/William/Desktop/C-large.in"));
			String strLine;
			
			FileWriter fostream = new FileWriter("/Users/William/Desktop/output.txt");
			BufferedWriter out = new BufferedWriter(fostream);
			
			strLine = br.readLine();
			int numOfLine = Integer.parseInt(strLine);
			
			for (int i=1;i<numOfLine+1;i++) {
				strLine = br.readLine();
				
				String splitedStr[] = strLine.split(" ");
				String first = splitedStr[0];
				String second = splitedStr[1];
				
				int firstNum = Integer.parseInt(first);
				int secondNum = Integer.parseInt(second);
								
				int count = 0;
				for (int k=firstNum;k<=secondNum;k++) {

					Integer kInt = new Integer(k);
					String kStr = kInt.toString();
					
					HashMap<Integer, ArrayList<Integer>> map = new HashMap<Integer, ArrayList<Integer>>();

					for (int j=1;j<kStr.length();j++) {
						String digit = kStr.substring(kStr.length()-j);
						String rest = kStr.substring(0, kStr.length()-j);
						
						String newStr = digit + rest;
						if (newStr.charAt(0)=='0') {
							continue;
						}
						
						int newNum = Integer.parseInt(newStr);
						
						ArrayList<Integer> list;
						if (map.get(k)==null) {
							list = new ArrayList<Integer>();
						}
						else {
							list = map.get(k);
						}
						
						boolean contains = false;
						for (Integer m : list) {
							if (m.intValue()==newNum) {
								contains = true;
								break;
							}
						}
						
						if (contains) {
							continue;
						}
						
						list.add(newNum);
						map.put(k, list);
						
						if ((newNum>k) && (newNum<=secondNum)) {
//							System.out.println("(" + k + " , " + newNum + ")");
							count ++;
						}
					}
				}
				System.out.println("Case #" + i + ": " + count);
				out.write("Case #" + i + ": " + count + "\n");
			}
			out.close();
			br.close();
		}
		catch (Exception e) {
			System.err.println("Error: " + e.getMessage());
		}
	}

}
