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

public class recycled_numbers {
	public static void main(String[]a) throws Exception{
		
		Scanner f = new Scanner(new File(a[0]));
		int result=0;
		int A,B;
		String n,m;
		HashSet<String> s=new HashSet<String>();
		
		int T=f.nextInt();	//T total case count
		for (int t=1; t<=T;t++){//for each case t
			
			s.clear();
			result=0;				//reset
			A=f.nextInt();B=f.nextInt();	//get values for next case
			
			if (A==B)result=0;//remove case not meeting problem limits 
			else{
				for(int i=A;i<=B;i++){//for each int in range
					n=Integer.toString(i);
					m=new String(n);
					//System.out.println(n);
					for (int j=1;j<n.length();j++){//move each digit to the front & test
						m = m.substring(m.length()-1)+m.substring(0,m.length()-1);
						if(m.matches("^0+[\\d]+")!=true &&
								Integer.parseInt(m)<=B &&
								Integer.parseInt(n)<Integer.parseInt(m)){
							s.add(new String(n+","+m));
							//result++;
							//System.out.println(" matched: "+m);
						}
						
					}
				}
				result = s.size();
			}

			//display output
			System.out.println("Case #" + t + ": " + result);
		}
	}
}
/*
PROG: ProbC
2012 Google CodeJam Qualification Round
Problem C
*/

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

public class Prob1C{

	public static void main(String [] args) throws IOException {
		//long start = System.currentTimeMillis();
		BufferedReader f = new BufferedReader(new FileReader("Prob1C.in"));
		PrintWriter out = new PrintWriter(new BufferedWriter(new FileWriter("Prob1C.txt")));
		int N = Integer.parseInt(f.readLine());
		for(int i = 0; i < N; i++){
			String[] str = (f.readLine()).split(" ");
			int A = Integer.parseInt(str[0]);
			int B = Integer.parseInt(str[1]);
			int m = (int)Math.log10(A);
			int count = 0;
			for(int j = A; j <= B; j++){
				Set<Integer> set = new HashSet<Integer>();
				for(int k = 1; k <= m; k++){
					int mod = (int)Math.pow(10, k);
					int lod = (int)Math.pow(10, m - k + 1);
					int r = j % mod;
					int l = j / mod;
					int trans = r * lod + l;
					if(A <= trans && trans <= B && trans != j){
						if(set.add(trans))
							count++;
					}
				}
			}
			out.println("Case #" + (i+1) + ": " + count/2);
		}
		//long end = System.currentTimeMillis();
		//System.out.println(end - start);
		out.close();
	}
	

}
