Problem:
Score : 400 points

Problem Statement

Takahashi has a string S consisting of lowercase English letters.

Starting with this string, he will produce a new one in the procedure given as follows.

The procedure consists of Q operations. In Operation i (1 \leq i \leq Q), an integer T_i is provided, which means the following:

If T_i = 1: reverse the string S.

If T_i = 2: An integer F_i and a lowercase English letter C_i are additionally provided.

If F_i = 1 : Add C_i to the beginning of the string S.

If F_i = 2 : Add C_i to the end of the string S.

Help Takahashi by finding the final string that results from the procedure.

Constraints

1 \leq |S| \leq 10^5

S consists of lowercase English letters.

1 \leq Q \leq 2 \times 10^5

T_i = 1 or 2.

F_i = 1 or 2, if provided.

C_i is a lowercase English letter, if provided.

Input

Input is given from Standard Input in the following format:

S
Q
Query_1
:
Query_Q

In the 3-rd through the (Q+2)-th lines, Query_i is one of the following:

1

which means T_i = 1, and:

2 F_i C_i

which means T_i = 2.

Output

Print the resulting string.

Sample Input 1

a
4
2 1 p
1
2 2 c
1

Sample Output 1

cpa

There will be Q = 4 operations. Initially, S is a.

Operation 1: Add p at the beginning of S. S becomes pa.

Operation 2: Reverse S. S becomes ap.

Operation 3: Add c at the end of S. S becomes apc.

Operation 4: Reverse S. S becomes cpa.

Thus, the resulting string is cpa.

Sample Input 2

a
6
2 2 a
2 1 b
1
2 2 c
1
1

Sample Output 2

aabc

There will be Q = 6 operations. Initially, S is a.

Operation 1: S becomes aa.

Operation 2: S becomes baa.

Operation 3: S becomes aab.

Operation 4: S becomes aabc.

Operation 5: S becomes cbaa.

Operation 6: S becomes aabc.

Thus, the resulting string is aabc.

Sample Input 3

y
1
2 1 x

Sample Output 3

xy

Solution in C# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using static System.Console;
using static System.Math;

namespace AtTest.ABC_158
{
    class D
    {
        static void Main(string[] args)
        {
            var sw = new System.IO.StreamWriter(OpenStandardOutput()) { AutoFlush = false };
            SetOut(sw);

            Method(args);

            Out.Flush();
        }

        static void Method(string[] args)
        {
            char[] s = Read().ToCharArray();
            int q = ReadInt();
            bool rev = false;
            List<char> left = new List<char>();
            List<char> right = new List<char>();
            for(int i = 0; i < q; i++)
            {
                string[] input = Read().Split();
                if (input.Length == 1)
                {
                    rev = !rev;
                }
                else
                {
                    int f = int.Parse(input[1]);
                    if (f == 1)
                    {
                        if (rev)
                        {
                            right.Add(input[2][0]);
                        }
                        else
                        {
                            left.Add(input[2][0]);
                        }
                    }
                    else
                    {
                        if (rev)
                        {
                            left.Add(input[2][0]);
                        }
                        else
                        {
                            right.Add(input[2][0]);
                        }
                    }
                }
            }

            if (rev)
            {
                for (int i = 0; i < right.Count; i++)
                {
                    Write(right[right.Count - 1 - i]);
                }
                for (int i = 0; i < s.Length; i++)
                {
                    Write(s[s.Length-i-1]);
                }
                for (int i = 0; i < left.Count; i++)
                {
                    Write(left[i]);
                }
            }
            else
            {
                for(int i = 0; i < left.Count; i++)
                {
                    Write(left[left.Count - 1 - i]);
                }
                for(int i = 0; i < s.Length; i++)
                {
                    Write(s[i]);
                }
                for(int i = 0; i < right.Count; i++)
                {
                    Write(right[i]);
                }
            }
            WriteLine();
        }

        private static string Read() { return ReadLine(); }
        private static char[] ReadChars() { return Array.ConvertAll(Read().Split(), a => a[0]); }
        private static int ReadInt() { return int.Parse(Read()); }
        private static long ReadLong() { return long.Parse(Read()); }
        private static double ReadDouble() { return double.Parse(Read()); }
        private static int[] ReadInts() { return Array.ConvertAll(Read().Split(), int.Parse); }
        private static long[] ReadLongs() { return Array.ConvertAll(Read().Split(), long.Parse); }
        private static double[] ReadDoubles() { return Array.ConvertAll(Read().Split(), double.Parse); }
    }
}