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

public class RecycledNumbers{
   public static void main(String[] args) throws Exception{
      BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
      Formatter formatter = new Formatter(System.out);
      int T = Integer.parseInt(br.readLine());
      int A,B;
      String[] lineParts;
      int lineNum=1;
      while(T-->0){
	 lineParts=br.readLine().split("\\s");
	 A=Integer.parseInt(lineParts[0]);
	 B=Integer.parseInt(lineParts[1]);
	 formatter.format("Case #%d: %d\n",lineNum++,cycles(A,B));
      }
      formatter.close();
   }
   private static int cycles(int A, int B){
      Set<String> pairs= new HashSet<String>();
      for(int n=A;n<B;n++){
	pairs.addAll(solve(n,B)); 
      }
      return pairs.size();
   }
   private static Set<String> solve(int n, int B){
      Set<String> pairs=new HashSet<String>();
      int m=n;
      int q,r;
      int nLen=(""+n).length();
      LinkedList<Integer> restQueue=new LinkedList<Integer>();
      for(int i=0;i<nLen;i++){
	 q=m/10;
	 r=m%10;
	 m=q;
	 restQueue.add(r);
	 if(r!=0){
	    int len=(""+m).length();
	    while(!restQueue.isEmpty()){
	       m+=restQueue.removeFirst()*Math.pow(10,len++);
	    }
	    if(m>n && m <=B) pairs.add(n+":"+m);
	 }
      }
      return pairs;
   }
}
