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;
	}
}
import java.util.*;
import java.io.*;
import java.lang.Integer;


public class QuestionC
{

    public static void main(String[] args) throws IOException
    {

        Scanner inPut = new Scanner(new File("C-small-attempt0.in"));
        FileWriter fWriter = new FileWriter("C-small-attempt0.out");
        int caseTotal = inPut.nextInt();
        inPut.nextLine();
        for (int caseNum = 1; caseNum <= caseTotal; caseNum++)
        {

            // read the string length for this case
            int base = 1;
            int smallNum = inPut.nextInt();
            int largeNum = inPut.nextInt();
            int digit = 0;
            int temp = smallNum;
            while(temp != 0)
            {
                temp = temp/10;
                digit++;
            }
            int[] num = new int[digit];
            int total = 0;

            for (int i = 1; i < digit; i++)
            {
                base = base * 10;
            }
            fWriter.write("Case #" + caseNum + ": ");
            for(int i = largeNum; i >= smallNum; i--)
            {
                num[0] = i;

                for (int j = 1; j < digit; j++)
                {
                    boolean norepeat = false;
                    num[j] = num[j - 1] / base + (num[j - 1] % base) * 10;

                    if (num[j] >= smallNum && num[j] <= largeNum)
                    {
                        norepeat = true;
                        for (int k = j - 1; k >= 0; k--)
                        {
                            norepeat = norepeat && (num[j] != num[k]);
                        }
                    }
                    if(norepeat) total++;
                }
            }
            total = total / 2;
            fWriter.write(total + "\n");
        }
        fWriter.flush();
        fWriter.close();
    }
}
