public static void Main()
int x1=Convert.ToInt32(Console.ReadLine());
int y1=Convert.ToInt32(Console.ReadLine());
int x2=Convert.ToInt32(Console.ReadLine());
int y2=Convert.ToInt32(Console.ReadLine());
if (x1==x2 || y1==y2)Console.WriteLine("yes");
else Console.WriteLine("no");