import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

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();
  }}
