import java.io.*;
import java.util.*;

class B
{
	public static void main(String[] args) 
	{
		try
		{
			BufferedReader br = new BufferedReader(new FileReader("B.in"));
			PrintWriter pw = new PrintWriter(new FileWriter("B.out"));
			int X = Integer.parseInt(br.readLine());

			for(int i=0; i<X; i++)
			{
				String[] S = br.readLine().split(" ");
				int A = Integer.parseInt(S[0]);
				int B = Integer.parseInt(S[1]);
				int R = 0;

				int x = 1;
				int n = 0;
				while(A/x > 0) {
					n++;
					x *= 10;
				}

				for(int j=A; j<B; j++) {
					Set<Integer> seen = new HashSet<Integer>();
					for(int k=1; k<n; k++) {
						int p1 = j % (int)Math.pow(10, k);
						int p2 = (int) Math.pow(10, n-k);
						int p3 = j / (int)Math.pow(10, k);
						int y = p1*p2 + p3;
						
						if(j < y && !seen.contains(y) && y <= B) {
							seen.add(y);
							R++;
						}
					}
				}

				pw.printf("Case #%d: %d\n", i+1, R);
				pw.flush();
			}
		}
		catch(Exception e)
		{ 
			e.printStackTrace();
		}
	}
}

import java.util.*;
import static java.lang.Math.*;
import java.io.*;

public class C {
		
public static void main(String[] args) throws IOException {
  /*BufferedReader in = new BufferedReader(new FileReader("C:/Users/Disha/Desktop/codejam/C-small.in"));
  FileWriter fw = new FileWriter("C:/Users/Disha/Desktop/codejam/C-small.out");*/
  BufferedReader in = new BufferedReader(new FileReader("C:/Users/Disha/Desktop/codejam/C-large.in"));
  FileWriter fw = new FileWriter("C:/Users/Disha/Desktop/codejam/C-large.out");

  int N = new Integer (in.readLine());
  int count = 0;
  for (int cases = 1; cases <= N; cases++) {
	  count = 0;
	  String[] ss = in.readLine().split(" ");
	  int a = Integer.parseInt(ss[0]);
	  int b = Integer.parseInt(ss[1]);
      for (int here = a; here <= b; here++) {
		  int len = Integer.toString(here).length();   	  
		  int len2 = (int) (Math.pow(10, (len-1)));
    	  int num2 = 0;    	  
    	  int num1 = here;
    	  for(int i=0; i<= (len - 1) ; i++){
    		  num2 = (10 * (num1 % len2)) + (num1 / len2);
    		  while(Integer.toString(num2).length() < len){
    			  num2 = num2*10;
    			  i++;
    		  }
    		  
    		  if (num2 == here){
    			  break;
    		  }
    		  if ((num2 <= b) && (num2 > here)){
    		  count ++;
    		  }
    		  num1 = num2;
    	  }
      }
    	  fw.write ("Case #" + cases + ": " + count + "\n" );
      }
  fw.flush();
  fw.close();
  }}
