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.*;
import java.util.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class Main {

	public static void main(String[] args) throws Exception {
		PrintWriter out = new PrintWriter(new FileOutputStream(new File("output.txt")), false);
		BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(new File("input.txt"))));
		// StringTokenizer st = new StringTokenizer(in.readLine());
		// Scanner s = new Scanner(System.in);
		int n = Integer.parseInt(in.readLine());
		
		for(int i = 0;i < n;i++) {
			StringTokenizer st = new StringTokenizer(in.readLine());
			int a = Integer.parseInt(st.nextToken());
			int b = Integer.parseInt(st.nextToken());
			int len = len(a);
			int ten = (int)Math.pow(10, len-1);
			
			int res = 0;

			for(int j = a;j <= b;j++) {
				int cur = j;
				int val = j;
				int per = period(j,len);
				for(int k = 0;k < per;k++) {
					int c = val%10;
					val = val/10+c*ten;
					if(val > cur && val <= b) {
						res++;
					}
				}
 			}
			out.println("Case #"+(i+1)+": "+res);
			out.flush();
		}
	}
	
	public static int period(int n, int len) {
		if(len == 2 && n/10 == n%10) return 1;
		if(len == 4 && n%100 == n/100) return 2;
		if(len == 6 && n%100 == n/10000 && n%100 == n/100%100) return 2;
		if(len == 6 && n%1000 == n/1000) return 3;
		return len;
	}
	
	public static int len(int n) {
		int len = 0;
		while(n > 0) {
			n /= 10;
			len++;
		}
		return len;
	}

}