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.util.HashSet;
import java.util.Scanner;
import java.util.Set;


public class Q3 {

	public static void main (String[] args)
	{
		Scanner s = new Scanner(System.in);
		int numTests = s.nextInt();
		for (int test = 0; test < numTests; test++)
		{
			int a = s.nextInt();
			int b = s.nextInt();
			int count = 0;
			for (int i = a; i < b; i++)
			{
				String si = String.valueOf(i);
				Set<Integer> found = new HashSet<Integer>();
				for (int j = 0; j < si.length(); j++)
				{
					String sj = si.substring(j) + si.substring(0, j);
					int other = Integer.parseInt(sj);
					if (!found.contains(other) && other > i && other <= b)
					{
						found.add(other);
						count++;
					}
				}
			}
			System.out.println("Case #" + (test+1) + ": " + count);
		}
	}
	
}
