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.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;

public class C {
	private static Map<Long, Long> map = new HashMap<Long, Long>();

	public static void main(String args[]) {
		try {
			String fileName = "C:\\Users\\Lenovo Z370\\Desktop\\gcj\\comp-2012\\C-small-attempt1.in";
			BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(fileName)));
			int t = Integer.parseInt(br.readLine());
			for(int i=0; i<t; i++) {
				map.clear();
				String[] abs = br.readLine().split("\\s+");
				long a = Long.parseLong(abs[0]);
				long b = Long.parseLong(abs[1]);
				
				long count = 0;
				
				for(long j=a; j<=b; j++) {
					long n=j;
					String s = String.valueOf(n);
					int l = s.length()-1;
					for(int k=0; k<l; k++) {
						int r = (int)(n%10);
						long m = (long)(r*Math.pow(10, l)) + n/10;

						if(m > j && m >= a && m <= b) {
							Long val = map.get(j);
							if(val == null || val != m) {
								map.put(j, m);
								count++;
							}
						}
						n=m;
					}
				}
				
				System.out.println("Case #" + (i+1) + ": " + count);
			}
		} catch(Exception e) {
			e.printStackTrace();
		}
	}
}
