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();
	}
}

import java.io.*;
public class RecycledNumbers
{
    public void RecycledNumbers()throws IOException
    {        
          FileInputStream fstream = new FileInputStream("C:/Users/m.l/Desktop/C-small-attempt0.in"); 
          DataInputStream in = new DataInputStream(fstream);
          BufferedReader br = new BufferedReader(new InputStreamReader(in));
          int T=Integer.parseInt(br.readLine());
          String S[]=new String[T];int i,j,k,s,l,p,q,A=0,B=0;String a,temp1;
          for(i=0;i<T;i++)
          { 
              s=0;
              S[i]=br.readLine();l=S[i].length();
              for(j=0;j<l;j++)
              {
                  if(S[i].charAt(j)==' ')
                  {
                      A=Integer.parseInt(S[i].substring(0,j));
                      B=Integer.parseInt(S[i].substring(j+1));
                    }
                }
             for(j=A;j<=B;j++)
             {
                 a=Integer.toString(j);int temp2[]=new int[l];l=a.length();
                 for(k=0;k<l-1;k++)
                 {
                     temp1=a.substring(1)+a.charAt(0);temp2[k]=Integer.parseInt(temp1);
                     a=temp1;
                    }
              for(p=0;p<l;p++)
              {
                  q=0;
                  if(temp2[p]>j&&temp2[p]<=B&&temp2[p]>=A)
                  for(q=p+1;q<l;q++)
                  {
                      if(temp2[q]==temp2[p])
                      break;
                    }
                 if(q==l)
                 s+=1;
                }
            }
             System.out.println("Case #"+(i+1)+": "+s);   
            }
        }
    }