import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
import java.io.FileReader;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try {
            Scanner in = new Scanner(new FileReader("in.txt"));
            PrintWriter out = new PrintWriter(new FileWriter("out.txt"), true);

            int N = in.nextInt();
            for (int I = 1; I <= N; I++) {
                int a = in.nextInt();
                int b = in.nextInt();
                int count = 0;
                for (int i = a; i < b; i++) {
                    char m[] = (i + "").toCharArray();
                    //out.println("m: "+ Arrays.toString(m));
                    char[] mm = m.clone();
                    Arrays.sort(mm);
                    for (int j = i + 1; j <= b; j++) {
                        char n[] = (j + "").toCharArray();
                        char[] nn = n.clone();
                        Arrays.sort(nn);

                        if (Arrays.equals(nn, mm)) {
                            for(int k = 1; k < n.length; k++){
                                String s = new String(Arrays.copyOfRange(n.clone(), k, n.length));
                                s += new String(Arrays.copyOf(n.clone(), k));
                                if(s.equals(new String(m))){
                                    count++;
                                    break;
                                }
                            }
                        }

                        //out.println("n: "+ Arrays.toString(n));
                        /*int index = 0;
                        for (int k = n.length - 1; k >= index; k--) {
                            if (m[index] == n[k]) {
                                char c = n[k];
                                for(int kk = k; kk > index; kk--){
                                    n[kk] = n[kk - 1];
                                }
                                n[index] = c;
                                index++;
                            }
                        }
                        if (index == n.length - 1) {
                            count++;
                            out.println("m: "+ Arrays.toString(m));
                            out.println("n: "+ Arrays.toString(n));
                        }      */
                    }
                }
                out.println("Case #" + I + ": " + count);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}