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.*;
import java.util.HashSet;

public class Solution {
	public static void main(String[] args) throws IOException {
		StreamTokenizer in = new StreamTokenizer(new BufferedReader (new FileReader("input.in")));
		PrintWriter out = new PrintWriter(new File("output.out"));
		
		in.nextToken();
		int t = (int)in.nval;
		for (int i = 0; i<t; i++){
			out.print("Case #" + (i+1) + ": ");
			int ans = 0;
			in.nextToken();
			int a = (int)in.nval;
			in.nextToken();
			int b = (int)in.nval;
			for (int j = a; j<=b; j++){
				int n = j;
				HashSet<Integer> set = new HashSet<Integer>();
				StringBuilder sN = new StringBuilder((new Integer(j)).toString());
				for (int k = 0; k<sN.length()-1; k++){
					sN.insert(0, sN.charAt(sN.length()-1));
					sN.deleteCharAt(sN.length()-1);
					if (sN.charAt(0) != '0') {
						int m = Integer.valueOf(sN.toString());
						if (n<m && m>=a && m<=b && !set.contains(new Integer(m))) {
							ans++;
							set.add(m);
						}
					}
				}
			}
			out.println(ans);
		}
		out.close();
	}
}
