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.cases.competition.qualification_round_2012;

import gcj.main.Case;

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

public class CaseC implements Case{
	
	private int caseNum;
	private long min;
	private long max;
	private long solution;
	

	@Override
	public void init(int caseNum, BufferedReader br) throws Exception {
		String strLine;
		{
			//caseNum
			this.caseNum = caseNum;
			System.out.println("Act case: " + this.caseNum);
		}
		{
			//param 1, min max
			if ((strLine = br.readLine()) != null){
				String[] p = strLine.split(" ");
				min = Long.parseLong(p[0]);
				max = Long.parseLong(p[1]);
			}else{
				throw new Exception("Wrong input");
			}
		}
	}

	
	@Override
	public void solve() throws Exception {
		solution=0l;
		for(long nIter = min; nIter<max; nIter++){
			String nValue = "" + nIter;
			Set<Long> mPairs = new HashSet<Long>();
			for(int i=0; i<nValue.length()-1; i++){
				String nRecicled = nValue.substring(i+1) + nValue.substring(0, i+1);
				long m = Long.parseLong(nRecicled);
				if(m>nIter && m<=max && !mPairs.contains(m)){
					solution++;
					mPairs.add(m);
				}
			}
		}
	}
	
	
	@Override
	public void generateOutput(BufferedWriter bw, boolean needBR) throws Exception {
		bw.write("Case #" + this.caseNum + ": " + this.solution);
		if(needBR){
			bw.newLine();
		}
	}


}
