import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class GoogleC {
	public String szamol(String input){
		String result="";
		String a=input;
		Integer min=Integer.parseInt(a.substring(0,a.indexOf(' ')));
		a=a.substring(a.indexOf(' ')+1);
		Integer max=Integer.parseInt(a);
		Long count=0l;
		for(Integer i=min; i<=max; i++){
			String e1=i.toString();
			Set<Integer> db=new HashSet<Integer>(); 
			for (int j=1; j<e1.length();j++){
				
				String e2=e1.substring(j)+e1.substring(0,j);
				Integer k=Integer.parseInt(e2);
				if (k>i && k<=max){
					db.add(k);
					//System.out.println(e1+"\t"+e2);
				}
				
			}
			count+=db.size();
		}
		
		return count.toString();
	}
	public static void main(String[] args) {
		GoogleC a=new GoogleC();
		//String filename="input.txt";
		//String filename="C-small-attempt0.in";
		String filename="C-large.in";
		String thisLine;
		try {
			BufferedReader br = new BufferedReader(new FileReader(filename));
			BufferedWriter bw= new BufferedWriter(new FileWriter(filename+".out"));
			thisLine=br.readLine();
			Integer tnum=Integer.parseInt(thisLine);
		     for(int i=0;i<tnum;i++) { // while loop begins here
		    	 	thisLine=br.readLine();
		           System.out.println(thisLine);
		           System.out.println("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		           bw.write("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		         } // end while 
		        // end try
		     br.close();
		     bw.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}


	}

}

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.Writer;
import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class ProblemC {
	public static void main(String[] args) throws IOException {
		new ProblemC();
	}

	private int numOfTest;
	private static final int ATTEMPT_NO = 0;
	private static int SOLVE_HARD = 1;
	int A, B;
	int ans;
	int[] cache = new int[2000002];

	public ProblemC() throws IOException {
		//Scanner input = new Scanner(new File("input.txt"));
		Scanner input = new Scanner(new File("C-small-attempt" + ATTEMPT_NO + ".in"));
		Writer output = new FileWriter("C-small-attempt" + ATTEMPT_NO + ".out");
		if (SOLVE_HARD != 0) {
			input = new Scanner(new File("C-large.in"));
			output = new FileWriter("C-large.out");
		}
		//output = new BufferedWriter(new OutputStreamWriter(System.out));

		numOfTest = input.nextInt();
		for (int test = 1; test <= numOfTest; test++) {
			// read from input
			A = input.nextInt();
			B = input.nextInt();

			process();
			output.write("Case #" + test + ": " + ans + "\n");
		}

		input.close();
		output.flush();
		output.close();
	}

	private void process() {
		ans = 0;
		for (int num = A; num < B; num++) {
			int left = num;
			int right = 0;
			int mul10 = 1;
			Set<Integer> checked = new HashSet<Integer>();
			boolean lastGood = false;
			while (left > 0) {
				if (lastGood) {
					int m = Integer.parseInt(String.valueOf(right) + String.valueOf(left));
					if (m > num && m <= B && !checked.contains(m)) {
						//System.err.println(num + " " + m + " " + ans);
						checked.add(m);
						ans++;
					}
				}
				int lastDigit = left % 10;
				right = lastDigit * mul10 + right;
				left /= 10;
				mul10 *= 10;
				lastGood = (lastDigit != 0);
			}
		}
	}
}