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.DataInputStream;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List;


public class Test {

	public static void main(String[] args){
		FileInputStream fstream = null;
		DataInputStream in = null;
		BufferedReader br = null;
		FileWriter fw = null;
		BufferedWriter out = null;
		
		try{
			  fstream = new FileInputStream(args[0]);
			  in = new DataInputStream(fstream);
			  br = new BufferedReader(new InputStreamReader(in));
			  
			  fw = new FileWriter(args[1]);
			  out = new BufferedWriter(fw);
			  
			  String strLine;
			  int i = 0;
			  int tc = 0;
			 
			  while ((strLine = br.readLine()) != null)   {
				  if(i == 0){
					 tc = Integer.parseInt(strLine);
					 i++;
					 continue;
				  }
				  if( i <= tc){
					  String[] arr = strLine.split(" ");
					  int minLimit = Integer.parseInt(arr[0]);
					  int maxLimit = Integer.parseInt(arr[1]);
					  int count = 0;
					  int len = arr[0].length();
					  if(len <= 1){
						  count = 0;
					  }else{
						  for(int j = minLimit; j <= maxLimit ; j++){
							  int num = j;
							  List ls = new ArrayList();
							  for(int k = 1; k < len ; k++ ){
								  int dp = (int)Math.pow(10, len -k);
								  int mp = (int)Math.pow(10, k);
								  int first = num / dp;
								  int last = num % dp;
								  int number = last*mp + first;
								  
								  if(num != number){
									  if(number <= maxLimit && number >= minLimit){
										  if(!ls.contains(number+"")){
											  ls.add(number+"");
											  count++;
										  }
										 
									  }
								  }
								  
							  }
						  }
					  }
					  count = count/2;
					  System.out.println("Case #"+i+": "+count);
					  out.write("Case #"+i+": "+count);
					  out.write(System.getProperty( "line.separator" ));
				  }
				  i++;
			  }
			  
			  in.close();
			  out.close();
		}catch (Exception e){
			e.printStackTrace();
			System.err.println("Error: " + e.getMessage());
		}
	}
	
	
}


