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 gcj.gcj2012.qualif;

import gcj.SolverBase;

import java.io.BufferedReader;
import java.io.PrintStream;
import java.util.HashSet;
import java.util.Set;

public class ProblemC extends SolverBase {

    public ProblemC() {
        super("Recycled Numbers");
    }

    public static void main(String[] args) throws Exception {
        SolverBase problem = new ProblemC();
        // problem.verbose = true;
        problem.solve(System.in, System.out);
    }

    @Override
    public void solveSingle(BufferedReader reader, PrintStream out) throws Exception {
        int[] AB = readSingleLineIntArray(reader);
        int A = AB[0];
        int B = AB[1];

        // How many digits?
        int d = (""+A).length();
        check(d == (""+B).length());

        int x = 0;
        Set<String> done = new HashSet<String>();

        // Naive implementation 1 : full loop
        for(int i=A;i<B;i++){
            for(int k=1;k<d;k++){
                int j = rotate(i,d,k);
                if( i<j && j<=B ){
                    String pair = i+","+j;
                    if( !done.contains(pair) ){
                        x ++;
                        done.add(pair);
                    }
                }
            }
        }

        out.println(x);
    }

    static int[] pows = { 1, 10, 100, 1000, 10000, 100000, 1000000, 10000000 };

    private int rotate(int i, int d, int k) {
        int pow1 = pows[k];
        int pow2 = pows[d-k];
        int bar = i/pow1;
        int foo = pow2 * (i%pow1);
        int j = foo + bar;
        //System.out.println("rotate("+i+","+k+")"+" = "+j);
        return j;
    }
}
