using System;
using System.Collections.Generic;

namespace _08.BalancedParentheses
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();

            Queue<char> firstPart = new Queue<char>();
            Stack<char> secondPart = new Stack<char>();

            if (input.Length % 2 == 0 && input.Length != 0)
            {

                for (int i = 0; i < input.Length / 2; i++)
                {
                    firstPart.Enqueue(input[i]);
                }

                for (int i = input.Length / 2; i < input.Length; i++)
                {
                    secondPart.Push(input[i]);
                }

                while (firstPart.Count > 0)
                {

                    if (firstPart.Peek() == '{' && secondPart.Peek() == '}')
                    {
                        firstPart.Dequeue();
                        secondPart.Pop();
                    }
                    else if (firstPart.Peek() == '(' && secondPart.Peek() == ')')
                    {
                        firstPart.Dequeue();
                        secondPart.Pop();
                    }
                    else if (firstPart.Peek() == '[' && secondPart.Peek() == ']')
                    {
                        firstPart.Dequeue();
                        secondPart.Pop();
                    }
                    else if (firstPart.Peek() == ' ' && secondPart.Peek() == ' ')
                    {
                        firstPart.Dequeue();
                        secondPart.Pop();
                    }
                    else
                    {
                        Console.WriteLine("NO");
                        return;
                    }
                }
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");

            }
        }
    }
}