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

class Program
{
    static void Main(string[] args) {
#if DEBUG
        MyDebugger.Test(process, "../TextFile1.txt");
        //MyDebugger.Test(process, "../TextFile2.txt");
        //MyDebugger.MakeTestCase("../TextFile2.txt");
#else
        object ret = process(new StreamReader(Console.OpenStandardInput()));
        Console.WriteLine(ret);
#endif
    }

    static object process(TextReader input) {
        var s = input.ReadLine();
        var q = int.Parse(input.ReadLine());

        var builH = new StringBuilder();
        var builT = new StringBuilder();

        var rev = false;

        for(int i=0; i<q; i++) {
            var spl   = input.ReadLine().Split(' ');
            var a     = int.Parse(spl[0]);

            if(a == 1) {
                rev = !rev;
            } else {
                var f = int.Parse(spl[1]);
                var c = spl[2][0];

                if(f == 1) {
                    if (!rev) builH.Append(c);
                    else builT.Append(c);
                } else {
                    if (!rev) builT.Append(c);
                    else builH.Append(c);
                }
            }
        }

        var buil = new StringBuilder(s.Length + builH.Length + builT.Length);

        if (!rev) {
            for(int i=0; i<builH.Length; i++) {
                buil.Append(builH[builH.Length - i - 1]);
            }
            for(int i=0; i<s.Length; i++) {
                buil.Append(s[i]);
            }
            buil.Append(builT);
        }
        else {
            for(int i=0; i<builT.Length; i++) {
                buil.Append(builT[builT.Length - i - 1]);
            }
            for(int i=0; i<s.Length; i++) {
                buil.Append(s[s.Length - i -1]);
            }
            buil.Append(builH);
        }

        return buil;
    }
}