import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

import java.io.*;

public class recycled {
	private boolean compare(String s1, String s2){
		String s3 = s2+s2;
		boolean result = s3.contains(s1);
		return result;
	}
	private void go() throws Exception {
		File infile = new File("C-small-attempt1.in");
		BufferedReader br = new BufferedReader(new InputStreamReader(
				new FileInputStream(infile)));
		int num_of_cases = Integer.parseInt(br.readLine());
		for (int i = 1; i <= num_of_cases; i++) {
			String[] case_str = br.readLine().split(" ");
			int begin_num = Integer.parseInt(case_str[0]);
			int end_num = Integer.parseInt(case_str[1]);
			int satisifed = 0;
			for(int k=begin_num;k<end_num;k++){
				if(k/10==0)continue;
				String cur_num_str = new Integer(k).toString();
				for(int j=k+1;j<=end_num;j++){
					if(compare(cur_num_str,new Integer(j).toString()))
							satisifed++;
				}
			}
			System.out.println("Case #"+i+": "+satisifed);
		}
	}
	public static void main(String[] args){
		try {
			new recycled().go();
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}
}
