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();
	}
}

package com.code.jam;

import java.io.File;
import java.io.PrintStream;
import java.util.Scanner;

import org.apache.commons.lang.StringUtils;

public class CRecycledNumbers {
	public static void main(String[] args) throws Exception {
		Scanner in = new Scanner (new File("C:/codeJam/ficheros2012/CRecycledNumbers.in"));
		PrintStream ps = new PrintStream("C:/codeJam/ficheros2012/CRecycledNumbers.out");
		int T = new Integer (in.nextLine());
		for (int nCase = 1; nCase < T + 1; nCase++) {
			Scanner inLine = new Scanner (in.nextLine());
			int recycledPair = 0;
			int A = inLine.nextInt();
			int B = inLine.nextInt();
			int lengthI = String.valueOf(A).length();
			
			if (lengthI > 1){
				for (int n = A; n <= B; n++){
					int operatorGetLeftRight = 1;
					int operatorNewNumber = Integer.valueOf(StringUtils.rightPad("1", lengthI + 1, '0'));
					for (int j = 1; j < lengthI; j++) {
						operatorGetLeftRight *= 10;
						operatorNewNumber /= 10;
						int newLeft = n % operatorGetLeftRight;
						int newRight = (n - newLeft) / operatorGetLeftRight;
						int m = newLeft * operatorNewNumber + newRight;
						if ((m >= A) && (m <= B) && (n < m)){
							recycledPair++;
//							if (lengthI == 4){
//								System.out.format("(%d, %d) \n", n, m);
//							}	
						}
					}
				}
			}
			System.out.format("Case #%d: %d\n", nCase, recycledPair);
			ps.format("Case #%d: %d\n", nCase, recycledPair);
		}
//		ps.flush();
//		ps.close();
	}
}
