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

namespace P08BalancedParantheses
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
           // bool isBalanced = true;

            var stack = new Stack<char>();

            if(input.Length == 0)
            {
                Console.WriteLine("NO");
                return;
            }
            else if (input.Length % 2 != 0)
            {
                Console.WriteLine("NO");
                return;
            }

            for (int i = 0; i < input.Length / 2; i++)
            {
                stack.Push(input[i]);

            }
           // Console.WriteLine(string.Join(" ", stack));

            for (int j = 0; j < input.Length / 2; j++)
            {
                char symbolToCheck = stack.Peek();

                if ((symbolToCheck == '[' && input[j + input.Length / 2] == ']')
                    || (symbolToCheck == '{' && input[j + input.Length / 2] == '}')
                    || (symbolToCheck == '(' && input[j + input.Length / 2] == ')'))
                {
                    stack.Pop();
                }
                else
                {
                    Console.WriteLine("NO");
                    break;

                }

            }

            if (stack.Count == 0)
            {
                Console.WriteLine("YES");
            }


        }
    }
}