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();
	}
}

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package google.code.jam.recycled.numbers;

import java.util.ArrayList;
import java.util.HashMap;

/**
 *
 * @author Lucas
 */
public class RecycledNumbers {

    public ArrayList<Integer> findRecycledNumbers(ArrayList<Integer[]> list) {

        ArrayList<Integer> result = new ArrayList<Integer>();
        Integer[] current;
        int x;
        int y;
        int total;
        int temp;
        String str;

        for (int n = 0; n < list.size(); n++) {

            current = list.get(n);
            total = 0;

            x = current[0];
            y = current[1];

            for (int m = x; m <= y; m++) {

                str = String.valueOf(m);

                for (int j = 0; j < str.length() - 1; j++) {

                    str = str.substring(1) + str.charAt(0);
                    temp = Integer.parseInt(str);

                    if ((temp <= y) && (temp > m) && (temp >= x)) { 
                        total++;
                    }
                }
            }
            result.add(total);
        }
        return result;
    }
}
