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.HashMap;
import java.util.Scanner;


public class RecycledNumbers {
	public static void main(String[] args) {
		Scanner in = new Scanner(System.in);

		int T = in.nextInt();
		
		for (int i = 1; i <= T; i++) {
			int A = in.nextInt();
			int B = in.nextInt();
			
			int numberOfRecycledPairs = findNumberOfRecycledPairs(A, B);
			System.out.format("Case #%d: %d\n", i, numberOfRecycledPairs);
		}
	}
	
	private static int findNumberOfRecycledPairs(int start, int end)
	{
		HashMap<String, String> recycledPairs = new HashMap<String, String>();
		for(int i = start; i <= end; i++)
		{
			int originalNumber = i;
			String numberStr = originalNumber + "";
			int numberLength = numberStr.length();
			for(int j = 1; j < numberLength; j++)
			{
				String newNumberStr = numberStr.substring(numberLength - j) + numberStr.substring(0, numberLength - j);
				int newNumber = Integer.parseInt(newNumberStr);
				if(newNumber >= start && newNumber <= end && newNumber > originalNumber)
					recycledPairs.put(originalNumber + "::" + newNumber,"");
			}
		}
		return recycledPairs.size();
	}

}
