import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

package recycle_no;

import java.io.*;
import java.util.Arrays;

public class Recycle_no {
    int N,a,b,count=0;
    String s="",temp[];
    public Recycle_no(){
        try {
            FileInputStream fis=new FileInputStream("C-large.in");
            DataInputStream dis=new DataInputStream(fis);
            FileOutputStream fos = new FileOutputStream("C-large.out");
            DataOutputStream dos=new DataOutputStream(fos);
            N=Integer.parseInt(dis.readLine());
            for(int i=1;i<=N;i++)
            {
                s=dis.readLine();
                count=0;
                temp=s.split(" ");
                a=Integer.valueOf(temp[0]);
                b=Integer.valueOf(temp[1]);
                for(int j=a;j<b;j++)
                {
                    count+=recycle(j, a, b);
                }
                s="Case #"+i+": "+count;
                if(i!=N)
                {
                    s=s+"\n";
                }
//                System.out.println(s);
                dos.writeBytes(s);
            }
            fis.close();
            fos.close();
            }catch(Exception e){
                System.out.println("Error: "+e);
            }

    }
    private int recycle(int n,int min,int max){
        int no=n,temp_no=n,r,digit=0,d,c=0,a[];
        while(temp_no!=0){
            temp_no=temp_no/10;
            digit++;
        }
        d=digit;
        a=new int[d];
        Arrays.fill(a, -1);
        while(d!=1){
            r=n%10;
            n=n/10;
            n=(int) (Math.pow(10,(digit-1))*r+n);
            if(n>=min && n<=max && n>no)
            {
                int flg=0;
                for(int j=0;j<a.length;j++)
                {
                    if(n==a[j])
                    {
                        flg=1;
                        break;
                    }
                }
                if(flg==0)
                {
                    a[c++]=n;
//                    System.out.println("val="+n+",no= "+no);
                }
            }
            d--;
        }
        return c;
    }
    public static void main(String[] args) {
       new Recycle_no();
    }
}
