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.*;
import java.util.*;
public class rfin {
public static void main(String args[]){
	try{
		FileInputStream fstream = new FileInputStream("C-small-attempt2.in");
		  // Get the object of DataInputStream
		  DataInputStream in = new DataInputStream(fstream);
		  BufferedReader br = new BufferedReader(new InputStreamReader(in));
		  FileWriter fstreamo = new FileWriter("out.txt");
		  BufferedWriter out = new BufferedWriter(fstreamo);
		  
		  
		//  System.out.println(g);
		 int t=Integer.parseInt(br.readLine());
		//  System.out.println(t);
		  int u,v,d,dr,rs,p,qs,q,qd,a,b,c,i,j,k,r,n,count;
		  String str;
		  for(i=0;i<t;i++){
			  count=0;
			  d=0;
			  str = br.readLine();
			  System.out.println(str);
			  StringTokenizer st=new StringTokenizer(str);
			  a=Integer.parseInt(st.nextToken());
			  //System.out.println(a);
		   	  b=Integer.parseInt(st.nextToken());
		   	//System.out.println(b);
		   	  n=b-a+1;
		   	  //System.out.println(n);
		   	  c=a;
		   	int[][] m = new int[1001][1001];
		   	for(u=0;u<1001;u++){
		   		for(v=0;v<1001;v++){
		   			if(u==v)m[u][v]=1;
		   			else m[u][v]=0;
		   		}
		   	}
		   	  while(c>0){
		   		  c=c/10;
		   		  d++;
		   	  }
		   	System.out.println(d);
		   	  for(j=a;j<=b;j++){
				   	//System.out.println(j);
		   		  
		   		  for(k=1;k<=d-1;k++){
		   		    	qd=0;dr=0;
		   			  p=(int)Math.pow(10,k);
		  		   //	System.out.println(p);	  
		   		    	q=j/p;
		   			   	//System.out.println(q);
		   		    	qs=q;
		   		    	while(qs>0){
		   		    		qs=qs/10;
		   		    		qd++;
		   		    	}
		   		    	r=q+(j%p)*((int)Math.pow(10,qd));
		   			 
		   			  
		   			   	System.out.println(j);		   	System.out.println(r);
		   			  System.out.println(m[j][r]);		   	System.out.println(m[r][j]);
		   			  rs=r;
		   			  while(rs>0){dr++;
		   			  rs=rs/10;}
		   			System.out.println(dr);
		  		   	System.out.println("++++++++++");
		   		if(m[j][r]!=1&&m[r][j]!=1&&dr==d&&r<=b&&j<r)
		   			  {count++;
		   			System.out.println(count);
		   			  System.out.println("=========");
		   			  m[j][r]=1;
		   			  m[r][j]=1;}
		   		  }
		   	  }
		  System.out.println(count);
		  out.write("Case #"+(i+1)+": "+count);
		  out.newLine();
		  }
		
	out.close();
	in.close();
	//out1.close();
	}
	
	catch(Exception e){//Catch exception if any
		  System.err.println("Error: " + e.getMessage());
	  }
	
	
}
}
