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 googleCodeJam;

import static java.lang.System.out;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.Set;
import java.util.TreeSet;

public class RecycledNumbers {
  public static void main(String[] args) throws Exception {
    if (args.length == 1) {
      // opening the input
      BufferedReader in = new BufferedReader(new FileReader(args[0]));
      
      // reading the number of test cases
      String line = null;
      int numberOfTestCases = ((line = in.readLine()) != null) ? Integer.parseInt(line) : 0;
      for (int t = 0; t < numberOfTestCases; t ++) {
        line = in.readLine();
        out.print("Case #" + (t+1) + ": ");
        
        // parse input
        String[] numbers = line.split(" ");
        int n = Integer.parseInt(numbers[0]);
        int m = Integer.parseInt(numbers[1]);
        
        int counter = 0;
        StringBuffer is = new StringBuffer(128);
        String isCurrent = null;
        for (int i = n; i <= m; i ++) {
          is.append(i);
          int size = is.length();
          is.append(i);
          //
          Set<Integer> qs = new TreeSet<Integer>();
          for (int j = 0; j < size; j ++) {
            isCurrent = is.substring(j, j+size);
            int q = Integer.parseInt(isCurrent);
            if (i < q && q <= m /*&& !isCurrent.startsWith("0")*/) {
              //counter ++;
              //out.println(i + "\t" + q + "\t" + (size - j));
              qs.add(q);
            }
          }
          //
          counter += qs.size();
          is.setLength(0);
        }
        
        out.println(counter);
      }
      
      // closing the input
      in.close();
    } else {
      // show the usage
      System.err.println("Using: java googleCodeJam.RecycledNumbers input");
    }
  }

}
