using System;
using System.Collections.Generic;
using System.Linq;

public class Test
{
	public static void Main()
	{
		var list = Console.ReadLine()
					.Split(' ')
					.Select(x => long.Parse(x))
					.ToList();
					
		var ans = list[0] >= list[1] ? "S" : "K";
		Console.WriteLine(ans);
	}
}