using System;

namespace DateChecker
{
	class Class1
	{
		[STAThread]
		static void Main(string[] args)
		{
			class Introduction
			{
				static void Intro()
				{
					Console.WriteLine("Welcome to the DateChecker Program!");
					Console.WriteLine("***********************************");
				}
				class Input_Day
				{
					static void ValidDay(out string InputDay)
					{
						InputDay = "Please enter the day of the month (DD): ";
						int sUserDay = Int32.Parse(Console.ReadLine());
					}
					class Input_Month
					{
						static void ValidMonth(out string InputMonth)
						{
							InputMonth = "Please enter the month (MM): ";
							int sUserMonth = Int32.Parse(Console.ReadLine());
						}
						class Input_Year
						{
							static void ValidYear(out string InputYear)
							{
								InputYear = "Please enter the year (YYYY): ";
								int sUserYear = Int32.Parse(Console.ReadLine());
							}
							
						}
						switch(Input_Month) 
						{
							case 0:
							case 2:
							case 4:
							case 6:
							case 7:
							case 9:
							case 11:
							
								sUserDay = case 0,2,4,6,7,9,11 <= 31;	  
								//If it has 31 days in the month
									  break; 
							case 3:
							case 5:
							case 8:
							case 10:
								sUserDay = case 3,5,8,10 <= 30;
								//If it has 30 days in the month
									  break;
							default: 
								sUserDay = default <= 28;
									   break; 
						}

				}
			}
		}

	}
}