/*
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 * and open the template in the editor.
 */
package gcj;

import java.io.File;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Scanner;

/**
 *
 * @author daniele
 */
public class GCJ_C {
    
    public static void main(String[] args) throws Exception{
        
        
        
        Scanner in = new Scanner(new File(args[0]));
        FileWriter out = new FileWriter("/home/daniele/Scrivania/Output");
        

        int prove=in.nextInt();
        int min,max;
        int cifre;
        int cifreaus;
        String temp;
        int aus;
        int count=0;
        ArrayList<Integer> vals = new ArrayList<Integer>();
        int jcount=0;
        ArrayList<Integer> perm = new ArrayList<Integer>();
        
        out.write("");
        out.flush();
        
        for(int i=1;i<=prove;i++){
            
            out.append("Case #" +i+": ");out.flush();
            
            min=in.nextInt();
            max=in.nextInt();
            
            for(int j=min;j<=max;j++){
               if(!vals.contains(j)){
                    temp=""+j;
                    cifre=temp.length();
                    aus=j;
                    perm.add(j);
                    for(int k=1;k<cifre;k++){
                        aus=rotateOnce(aus);
                        temp=""+aus;
                        cifreaus=temp.length();//elusione zeri iniziali
                        if(aus>=min && aus<=max && aus!=j && cifreaus==cifre && nobody(vals,perm)){ 
                            perm.add(aus);
                            jcount ++;
                            
                        }
                        
                    }
                    while(jcount>0){count+=jcount; jcount--;}
                    vals.addAll(perm);
                    perm= new ArrayList<Integer>();
                    
                }
            }
            out.append(count+"\n");out.flush();
            count=0;
            vals= new ArrayList<Integer>();
        }
        
        
        
    }
        static public int rotateOnce(int n){
            String s=""+n;
            if(s.length()>1){
                s=s.charAt(s.length()-1) + s.substring(0,s.length()-1);
                n=Integer.parseInt(s);
            }
            return n;
        }    
        
        static public boolean nobody(ArrayList<Integer> v,ArrayList<Integer> a){;
            for(int i=0;i<a.size();i++)
                if(v.contains(a.get(i))) return false;
            return true;
        } 
    
}


import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;



public class Solve3 {

	public static void main(String[] args) {

		FileReader fr;
		FileWriter fw;
		try {
			File fi = new File("input.txt");
			fr = new FileReader(fi);
			BufferedReader br = new BufferedReader(fr);
			fw = new FileWriter("output.txt");
			BufferedWriter bw = new BufferedWriter(fw);
			boolean f = true;
			int tCount = Integer.MAX_VALUE;
			int c = 1;
			String line = null;
			while((line = br.readLine()) != null && c <= tCount) {
				if(f) {
					f = false;
					tCount = Integer.parseInt(line);
					continue;
				}

				long ans = getVal(line);
				String os = "Case #" + c + ": " + ans;


				bw.write(os);
				bw.newLine();
				c++;
			}
			bw.flush();
			bw.close();
			br.close();
		} catch (FileNotFoundException eg) {
			// TODO Auto-generated catch block
			eg.printStackTrace();
		} catch (IOException ed) {
			// TODO Auto-generated catch block
			ed.printStackTrace();
		}
	}

	private static int getDC(long n) {
		int c = 0;
		while(n > 0) {
			c++;
			n = n/10;
			if(n == 0) {
				break;
			}
		}
		return c;
	}

	public static long getVal(String line) {
		String[] sa = line.split(" ");
		long n = Integer.parseInt(sa[0].trim());
		long m = Integer.parseInt(sa[1].trim());
		int dc = getDC(n);
		long count = 0;
		Map s = new HashMap();
		for(long i = n; i <= m; i++) {
			Set _s = correct(i, n, m, dc);
			if (_s.isEmpty()) continue;
			Iterator it = _s.iterator();
			while(it.hasNext()) {
			   Long o = (Long)it.next();
			   if (s.containsKey(o)) {
				   it.remove();
			   }
			}
			
			if (_s.isEmpty()) continue;
			s.put(i, _s);
		}
		
		Iterator mit = s.keySet().iterator();
		while(mit.hasNext()) {
			count += ((Set)s.get(mit.next())).size();
		}
		return count;
	}
	
	public static Set correct(long nt, long n, long m, int dc) {
		Set l = new HashSet();
		for(int i = 1; i < dc ;i ++) {
			long tens = (long)Math.pow(10, dc - i);
			long tenso = (long)Math.pow(10, i);
			long left = nt/tens;
			long right = nt%tens;
			long n_ = right * tenso + left;
			if (n_ >= n && n_ <= m && n_ != nt){
				l.add(n_);
			}
		}
		return l;
	}

}


