import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

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


public class RecycledNumbers {


	private static FileReader freader;
	private static BufferedReader buffreader;
	private static FileWriter fwriter;
	private static BufferedWriter buffwriter;
	
	public static void main(String[] args) throws IOException {
		
		freader = new FileReader("C-large.in");
		buffreader = new BufferedReader(freader);
		fwriter= new FileWriter("result-large.txt");
		buffwriter = new BufferedWriter(fwriter);
		String str = null;
		int linenum = 0;
		int i=1;
		while((str=buffreader.readLine())!=null){
			if(i==1)
				linenum=Integer.parseInt(str);
			else{
				int start = Integer.parseInt(str.split(" ")[0]);
				int end = Integer.parseInt(str.split(" ")[1]);
				int num = calRecycleNum(start, end);
				String finalStr = "Case #"+Integer.toString(i-1)+": "+Integer.toString(num)+"\n";
				buffwriter.write(finalStr);
			}
			i++;
		}
		buffwriter.close();
		fwriter.close();
		buffreader.close();
		freader.close();

	}
	
	public static int calRecycleNum(int start, int end){
		int num = 0;
		for(int i=start; i<=end; i++){
			int len = Integer.toString(i).length();
			int recycleVal = i;
			HashSet<Integer> targetSet = new HashSet<Integer>();
			for(int j=1; j<len; j++){
				recycleVal = recycleOnce(recycleVal,len);
				if(recycleVal<=i)
					continue;
				else if(recycleVal<=end && recycleVal>=start){
					if(!targetSet.contains(recycleVal)){
						num++;
						//System.out.println(i+"\t"+recycleVal);
						targetSet.add(recycleVal);
					}
					/*else{
						System.out.println("Duplicate:"+recycleVal+"\t"+i);
					}*/

				}
				
			}
		}
		//System.out.println(num);
		return num;
	}
	
	public static int recycleOnce(int val, int length){
		return (int) (val%Math.pow(10, length-1)*10+val/Math.pow(10, length-1));
	}

}
