using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace InterfaceIPerson
{
    class Program
    {
        static void Main(string[] args)
        {


            string[] phNumbers = Console.ReadLine().Split(' ');
            string[] webAddresses = Console.ReadLine().Split(' ');

            Smartphone sf = new Smartphone();
            foreach (var number in phNumbers)
            {
                Console.WriteLine(sf.CallOther(number));

            }
            foreach (var address in webAddresses)
            {
                Console.WriteLine(sf.BrowseInWeb(address));

            }
        }
    }

    class Smartphone : ICallable, IBrowsable
    {
        public string CallOther(string number)
        {
            string pat = @"^\d+$";
            Regex reg = new Regex(pat);
            if (reg.IsMatch(number))
            {
                return "Calling... " + number;
            }
            else
            {
                return "Invalid number!";
            }
            // is valid return Browsing: number
            // not valid return Invalid URL!
            throw new NotImplementedException();
        }

        public string BrowseInWeb(string webAdr)
        {
            string pat = @"^\D+$";
            Regex reg = new Regex(pat);
            if (reg.IsMatch(webAdr))
            {
                return "Browsing: " + webAdr + "!";
            }
            else
            {
                return "Invalid URL!";
            }
            throw new NotImplementedException();
        }
    }

    interface ICallable
    {
        string CallOther(string number);
    }

    interface IBrowsable
    {
        string BrowseInWeb(string webAdr);
    }

}