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.Linq;
using System.Collections.Generic;

using E = System.Linq.Enumerable;

public class Program
{
    public static void Main()
    {
        var s = Console.ReadLine().Trim();
        var q = int.Parse(Console.ReadLine());
        var seqQuery = Console.In.ReadToEnd()
            .Split(Environment.NewLine.ToCharArray(), StringSplitOptions.RemoveEmptyEntries);

        var ts = new char[s.Length + seqQuery.Length * 2];
        int head = seqQuery.Length;
        int last = head + s.Length;
        var reverse = false;
        Array.Copy(s.ToCharArray(), 0, ts, head, s.Length);
        for (int i = 0; i < seqQuery.Length; ++i)
        {
            if (seqQuery[i][0] == '1')
            {
                reverse = !reverse;
                continue;
            }

            var f = seqQuery[i][2];
            var c = seqQuery[i][4];
            if (f == '1' && !reverse || f == '2' && reverse)
            {
                --head;
                ts[head] = c;
            }
            else
            {
                ts[last] = c;
                ++last;
            }
        }

        var final = new char[last - head];
        Array.Copy(ts, head, final, 0, final.Length);
        if (reverse)
        {
            Array.Reverse(final);
        }
        
        Console.WriteLine(new string(final));
    }
}