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.*;
import java.io.*;
public class C
{
	List<String> arrList ;
	public void readFile(String srcFileName, String destFileName)
	{
		try
		{
			File srcFile = new File(srcFileName);
			File destFile = new File(destFileName);
			BufferedReader br = new BufferedReader(new FileReader(srcFile));
			BufferedWriter bw = new BufferedWriter(new FileWriter(destFile));
			int cases = Integer.parseInt(br.readLine());
			//cases =1;
			for(int i=0;i<cases;i++)
			{
				int counter =0;
				String lineInfo[] = br.readLine().split(" ");
				int firstNum = Integer.parseInt(lineInfo[0]);
				int secondNum = Integer.parseInt(lineInfo[1]);
				arrList= new ArrayList<String>();
				for(int k=firstNum;k<=secondNum;k++)
				{
					char[] ch = (k+"").toCharArray();
					for(int j =0; j<ch.length;j++)
					{
						ch = rotate(ch);
						int check = arrToString(ch);
					//	System.out.println(check);
						if(check != k && firstNum!=check && check!=secondNum)
						{
							if(firstNum<check && check<secondNum)
							{
								String sa = k+"-"+check;
								String sb = check+"-"+k;
								if(!arrList.contains(sa)&& !arrList.contains(sb))
								{
									arrList.add(sa);
									arrList.add(sb);
									counter++;
								}
							}
						}
					}
				}
				String str = "Case #"+(i+1)+": "+counter;
				bw.write(str);
				bw.newLine();
			}
			br.close();
			bw.close();
			
		}
		catch(Exception e)
		{
			System.out.println("Exception");
		}
	}
	
	public char[] rotate(char[] ch)
	{
		char temp = ch[0];
		for(int j=1;j<ch.length;j++)
		{
			ch[j-1]=ch[j];
		}
		ch[ch.length-1] = temp;
		return ch;
	}
	
	public int arrToString(char[] ch)
	{
		String str = "";
		for(int i=0;i<ch.length;i++)
		{
			str= str+ch[i];
		}
		return Integer.parseInt(str);
	}
	
	public static void main(String args[])
	{
		C c = new C();
		c.readFile(args[0],args[1]);
	}
}