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 jp.funnything.competition.util;

import java.util.Arrays;
import java.util.List;

import com.google.common.collect.Lists;
import com.google.common.primitives.Ints;
import com.google.common.primitives.Longs;

public class Prime {
    public static class PrimeData {
        public int[] list;
        public boolean[] map;

        private PrimeData( final int[] values , final boolean[] map ) {
            list = values;
            this.map = map;
        }
    }

    public static long[] factorize( long n , final int[] primes ) {
        final List< Long > factor = Lists.newArrayList();

        for ( final int p : primes ) {
            if ( n < p * p ) {
                break;
            }

            while ( n % p == 0 ) {
                factor.add( ( long ) p );
                n /= p;
            }
        }

        if ( n > 1 ) {
            factor.add( n );
        }

        return Longs.toArray( factor );
    }

    public static PrimeData prepare( final int n ) {
        final List< Integer > primes = Lists.newArrayList();

        final boolean[] map = new boolean[ n ];
        Arrays.fill( map , true );

        map[ 0 ] = map[ 1 ] = false;

        primes.add( 2 );
        for ( int composite = 2 * 2 ; composite < n ; composite += 2 ) {
            map[ composite ] = false;
        }

        for ( int value = 3 ; value < n ; value += 2 ) {
            if ( map[ value ] ) {
                primes.add( value );
                for ( int composite = value * 2 ; composite < n ; composite += value ) {
                    map[ composite ] = false;
                }
            }
        }

        return new PrimeData( Ints.toArray( primes ) , map );
    }
}
