import java.io.*;

class code1
{
	public static void main(String args[]) throws Exception 
	{
		File ii = new File ("C-small-attempt1.in");
		FileInputStream fis = new FileInputStream(ii);
		BufferedReader  br = new BufferedReader(new InputStreamReader (fis));
		int cases = Integer.parseInt(br.readLine());
		FileOutputStream fout = new FileOutputStream ("output.txt");
		DataOutputStream dout = new DataOutputStream (fout);
		int total=0;
		for(int i=0;i<cases;i++){
		String temp = br.readLine();
		String parts [] = temp.split(" ");
		int lower = Integer.parseInt(parts[0]);
		int upper = Integer.parseInt(parts[1]);
		System.out.println(lower+" "+upper);
		
		for(int j=lower;j<=upper;j++)
		{
			int abc = j;int length=0;
			if(j<10)continue;
			while (abc!=0){abc/=10;length++;}
			abc=j;
			for(int m=0;m<length-1;m++){
				int shift = abc%10;
				abc=abc/10;
				System.out.println("hi "+j);
				abc=abc+shift*power(10,length-1);
				if(abc<=upper&&shift!=0&&abc>j)total++;
				System.out.println(total);
			}
		}
 		dout.writeBytes("Case #"+(i+1)+ ": "+total+"\n");
 		total=0;
		}//for close
		
	}

	private static int power(int i, int j) {
		int no=1;
		for(int a=0;a<j;a++){no=10*no;}
		return no;
	}
}
/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
//package javaapplication1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
import java.util.Arrays;

/**
 *
 * @author kent.wangsawan
 */
public class soal2 {
    public static void main(String [] args) throws IOException{
        BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer tok;
        int tc = Integer.parseInt(input.readLine());
        for(int i = 0; i<tc; i++){
            tok = new StringTokenizer(input.readLine());
            int awal = Integer.parseInt(tok.nextToken());
            int akir = Integer.parseInt(tok.nextToken());
            int count = 0;
            for(int j = awal; j<akir; j++){
                int temp = j;
                if(temp<10) continue;
                else if(temp< 100){
                    int a = temp%10;
                    temp = temp/10;
                    temp += a*10;
                    if(temp >= awal && temp <= akir && temp > j) {
                        count++;
                    }
                }
                else if(temp<1000){
                    for(int k = 0; k<2; k++){
                        int a = temp%10;
                        temp = temp/10;
                        temp += a*100;
                        if(temp >= awal && temp <= akir && temp > j) {
                            count++;
                        }
                        else if (temp == j)
                            break;
                    }
                }
                else if(temp < 10000){
                    for(int k = 0; k<3; k++){
                        int a = temp%10;
                        temp = temp/10;
                        temp += a*1000;
                        if(temp >= awal && temp <= akir && temp > j) {
                            count++;
                        }
                        else if (temp == j)
                            break;
                    }
                }
            }
            System.out.println("Case #"+(i+1)+": "+count);
        }
    }
}
