import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashSet;
import java.util.Set;


public class GoogleC {
	public String szamol(String input){
		String result="";
		String a=input;
		Integer min=Integer.parseInt(a.substring(0,a.indexOf(' ')));
		a=a.substring(a.indexOf(' ')+1);
		Integer max=Integer.parseInt(a);
		Long count=0l;
		for(Integer i=min; i<=max; i++){
			String e1=i.toString();
			Set<Integer> db=new HashSet<Integer>(); 
			for (int j=1; j<e1.length();j++){
				
				String e2=e1.substring(j)+e1.substring(0,j);
				Integer k=Integer.parseInt(e2);
				if (k>i && k<=max){
					db.add(k);
					//System.out.println(e1+"\t"+e2);
				}
				
			}
			count+=db.size();
		}
		
		return count.toString();
	}
	public static void main(String[] args) {
		GoogleC a=new GoogleC();
		//String filename="input.txt";
		//String filename="C-small-attempt0.in";
		String filename="C-large.in";
		String thisLine;
		try {
			BufferedReader br = new BufferedReader(new FileReader(filename));
			BufferedWriter bw= new BufferedWriter(new FileWriter(filename+".out"));
			thisLine=br.readLine();
			Integer tnum=Integer.parseInt(thisLine);
		     for(int i=0;i<tnum;i++) { // while loop begins here
		    	 	thisLine=br.readLine();
		           System.out.println(thisLine);
		           System.out.println("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		           bw.write("Case #"+(i+1)+": "+a.szamol(thisLine)+"\n");
		         } // end while 
		        // end try
		     br.close();
		     bw.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}


	}

}

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

public class ProblemC {
    public static void main(String[]args) {
	Scanner f = new Scanner(System.in);
	int T = f.nextInt();
	
	for(int set=0;set<T;set++) {
	    int A = f.nextInt();
	    int B = f.nextInt();
	    
	    int b = B;
	    int leadingMult = 1;
	    while(b >= 10) {
		b /= 10;
		leadingMult*=10;
	    }
	    
	    // System.out.println("leadingMult: "+leadingMult);
	    
	    long pairs = 0;
	    for(int x=A;x<=B;x++) {
		// System.out.println("x: "+x);
		int y = x;
		do {
		    y = y/10 + leadingMult*(y%10);
		    // System.out.println("y: "+y);
		    if(x < y && y <= B) {
			//			System.out.printf("(%d,%d)\n",x,y);
			pairs++;
		    }
		} while(y!=x);
	    }
	    
	    System.out.printf("Case #%d: %d\n",set+1,pairs);
	}
    }
}