using System.Collections.Generic;
static void Main(string[] args)
var numbers = Console.ReadLine().Split("," ).Select(int.Parse).ToList();
var numbers4Or8 = numbers.Where(n => n % 10 == 4 || n % 10 == 8).ToList();
var numbers5Or7 = numbers.Where(n => n % 10 == 5 || n % 10 == 7).ToList();
var numbersSum15 = new List<int>();
Console.WriteLine(string.Join(", ", numbers4Or8));
Console.WriteLine(string.Join(", ", numbers5Or7));
for (int i = 0; i < numbers.Count; i++)
Console.WriteLine(string.Join(", ", numbers4Or8));
Console.WriteLine(string.Join(", ", numbers5Or7));
for (int i = 0; i < numbers.Count; i++)
numbersSum15.Add(numbers[1]);
Console.WriteLine("Sum = {sum:F2)");