Magic Strings

using System;

namespace Magic_Strings
{
	class MagicStrings
	{
		public static void Main(string[] args)
		{
			int diff = int.Parse(Console.ReadLine());
			char[] symbols = {'k', 'n', 'p', 's'};
			int count = 0;
			for(int d1 = 0; d1 < symbols.Length; d1++)
			{
				for(int d2 = 0; d2 < symbols.Length; d2++)
				{
					for(int d3 = 0; d3 < symbols.Length; d3++)
					{
						for(int d4 = 0; d4 < symbols.Length; d4++)
						{
							string str = "" + symbols[d1] + symbols[d2] + symbols[d3] + symbols[d4];
							int firstSum = Sum(str);
							for(int d5 = 0; d5 < symbols.Length; d5++)
							{
								for (int d6 = 0; d6 < symbols.Length; d6++)
								{
									for (int d7 = 0; d7 < symbols.Length; d7++)
									{
										for (int d8 = 0; d8 < symbols.Length; d8++)
										{
											string str2 = "" + symbols[d5] + symbols[d6] + symbols[d7] + symbols[d8];
											int secondSum = Sum(str2);
											if (Math.Abs(secondSum - firstSum) == diff)
											{
												Console.WriteLine("{0}{1}", str, str2);
												count++;
											}
										}
									}
								}
							}
						}
					}
				}
			}
			if (count == 0)
			{
				Console.WriteLine("No");
			}

		}
		private static int Sum (string str)
		{
			int weight = 0;
			foreach (var ch in str)
			{
				switch(ch)
				{
					case 's': weight += 3; break;
					case 'n': weight += 4; break;
					case 'k': weight += 1; break;
					case 'p': weight += 5; break;
				}
			}
			return weight;
		}
	}
}