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

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

            var stack = new Stack<char>(input);
            bool flag = true;
            for (int i = 0; i < input.Length/2; i++)
            {
                char element = stack.Pop();
                if (element == ')')
                {
                    element = '(';
                    if (element != input[i])
                    {
                        flag = false;
                        break;
                    }

                }
                else if (element == '}')
                {
                    element = '{';
                    if (element != input[i])
                    {
                        flag = false;
                        break;
                    }
                }
                else if (element == ']')
                {
                    element = '[';
                    if (element != input[i])
                    {
                        flag = false;
                        break;
                    }
                }
                else if (element == ' ')
                {

                    if (element != input[i])
                    {
                        flag = false;
                        break;
                    }
                }



            }
            if (flag)
            {
                Console.WriteLine("YES");
            }
            else
            {
                Console.WriteLine("NO");
            }


        }
    }
}