03. Snowflake

using System;
using System.Text.RegularExpressions;

namespace SnowFlake
{
    class Program
    {
        static void Main(string[] args)
        {
            string surfaceRegex = @"[^a-zA-Z\d]+";
            string mantleRegex = @"[\d_]+";
            string coreRegex = @"[A-Za-z]+";
            string full = @"[^a-zA-Z\d]+[\d_]+([A-Za-z]+)[\d_]+[^a-zA-Z\d]+";

            string topSurface = Console.ReadLine();
            string topMantle = Console.ReadLine();
            string wtf = Console.ReadLine();
            string bottomMantle = Console.ReadLine();
            string bottomSurface = Console.ReadLine();


            var firstMatch = Regex.Match(topSurface, surfaceRegex);
            var secondMatch = Regex.Match(topMantle, mantleRegex);
            var wtfMatch = Regex.Match(wtf, full);
            var fourthMatch = Regex.Match(bottomMantle, mantleRegex);
            var fifthMatch = Regex.Match(bottomSurface, surfaceRegex);

            if (firstMatch.Success && secondMatch.Success && wtfMatch.Success && fourthMatch.Success && fifthMatch.Success)
            {
                Console.WriteLine("Valid");
                Console.WriteLine(wtfMatch.Groups[1].Value.Length);
            }
            else
            {
                Console.WriteLine("Invalid");
            }
        }
    }
}