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.*;
class yo
{
public static void main(String args[])
throws IOException
{
try
{
FileWriter fs=new FileWriter("o1.out");
FileInputStream f1=new FileInputStream("C-small-attempt1(1).in");
DataInputStream d=new DataInputStream(f1);
BufferedReader br=new BufferedReader(new InputStreamReader(d));
BufferedWriter out=new BufferedWriter(fs);
String s,s1;
s=br.readLine();
int T=Integer.parseInt(s);
int cnt=0,nn,f,ll,ul,p;
String w1;
char temp;
for(int i=0;i<T;i++)
{
out.write("Case #"+(i+1)+": ");
s1=br.readLine();
String[] n=s1.split(" ");
ll=Integer.parseInt(n[0]);
ul=Integer.parseInt(n[1]);
p=ul-ll+1;
f=ll;
for(int j=0;j<p;j++)
{
s1=Integer.toString(f);
char c[]=new char[s1.length()];
c=s1.toCharArray();
for(int k=0;k<s1.length()-1;k++)
{
temp=c[s1.length()-1];
for(int l=(s1.length()-1);l>0;l--)
{
c[l]=c[l-1];
}
c[0]=temp;
w1="";
for(int m=0;m<s1.length();m++)
{
w1=w1+c[m];
}
nn=Integer.parseInt(w1);
if(nn>ll)
if(nn>f)
if(nn<=ul)
cnt=cnt+1;
}
f=f+1;
}
String h=Integer.toString(cnt);
out.write(h);
out.write("\r\n");
cnt=0;
}
out.close();
br.close();
}
catch(Exception e){
System.out.println("Error :"+e);
}
}
}