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

namespace _08_Balanced_Parenthesis
{
    class Program
    {
        static void Main(string[] args)
        {
            string input = Console.ReadLine();
        foreach(var symbols in input)
            {
                if (symbols=='{'||symbols=='}' )
                {
                    input = input.Replace(symbols, '1');
                }
                else if (symbols=='['||symbols==']' )
                {
                    input = input.Replace(symbols, '2');
                }
                else if (symbols=='('||symbols==')' )
                {
                    input = input.Replace(symbols, '3');
                }

            }
            var stack = new Stack<char>();


            for (int i = 0; i < input.Length; i++)
            {

                if (i<input.Length/2)
                {

                    stack.Push(input[i]);
                }
                else
                {

                    if (stack.Peek()==input[i])
                    {
                        stack.Pop();
                    }
                    else
                    {
                        Console.WriteLine("NO");
                        return;
                    }

                }
            }
            Console.WriteLine("YES");
        }
    }
}