import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int t=sc.nextInt();
		int casos=1, a, b, n, m, cont;
		while(t!=0){
			a=sc.nextInt();
			b=sc.nextInt();
			if(a>b){
				int aux=a;
				a=b;
				b=aux;
			}
			System.out.printf("Case #%d: ",casos++);
			if(a==b){
				System.out.printf("%d\n",0);
			}else{
				cont=0;
				for(n=a;n<b;n++){					
					for(m=n+1;m<=b;m++){					
						if(isRecycled(n,m)) cont++;
					}
				}
				System.out.printf("%d\n",cont);
			}
			t--;
		}		
	}
	public static boolean isRecycled(int n1, int n2){
		String s1, s2, aux;
		s1 =  String.valueOf( n1 );
		s2 =  String.valueOf( n2 );		
		boolean r = false;		
		for(int i=0;i<s1.length();i++){
			aux="";
			aux=s1.substring(i,s1.length())+s1.substring(0,i);
//			System.out.println(aux);
			if(aux.equals(s2)){
				r=true;
				break;
			}
		}		
		return r;
	}
}

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
  
public class Hw3 {

	public static int calNum(int n1, int n2){
	int num = 0;
	int i =0;
	for( i=n1; i<=n2; i++){
		String t = Integer.toString(i);
		int len = t.length();
		String shitString = t;
		//System.out.println("Origin "+ t);

		for(int tt=1; tt<len; tt++){
			String tmpString = shitString.substring(1, len);
			tmpString =tmpString+ shitString.substring(0,1);
			//System.out.println(" shit "+ tmpString);
			shitString = tmpString;
			int tmpNum = Integer.parseInt(shitString);
			if(tmpNum>i && tmpNum>=n1 && tmpNum<=n2)
				num++;
		}
		
	}
	
	return num;
}


	public static void main(String[] args) throws IOException {
		 //String line, ArrayList<Integer> sTree, 

		 
	      FileReader reader = new FileReader("/Users/leyu/Desktop/C.in");   
	      
	      BufferedReader br = new BufferedReader(reader);   
	      String s1 = "";   
	      int count = 0;
	      
//	      
//	      Map<String, Integer> triMap = new HashMap<String, Integer>();
//	      Map<String, Integer> mp0 = new HashMap<String, Integer>();
//	      Map<String, Integer> mpLine = new HashMap<String, Integer>();
//	      
	      int num = 0;
	      s1 = br.readLine();
	      count = Integer.parseInt(s1);
	      for( int i = 0; i<count ; i++){
	    	  s1 = br.readLine();
	    	  String []words = s1.split(" ");	
	    	  int n1 = Integer.parseInt(words[0]);
	    	  int n2 = Integer.parseInt(words[1]);
	    	  num = calNum(n1, n2);
	    	  System.out.println("Case #"+(i+1)+": "+num);
	      }


	       
	     br.close();   
	     reader.close();   
			
		}


}
