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: Time Limit Exceeded)

/*********************************************
* 20.05.08 AtCoder Beginner Contest 158. D - String Formation
* 
*
*********************************************/
/*********************************************
문자열 S, 쿼리횟수 Q가 주어질때
1이면 문자열 반전.
2이면 1일때 선두에, 2이면 후미에 문자 추가.
최종문자 출력.

::test input::
S
Q
Query1
...
QueryQ

a
4
2 1 p
1
2 2 c
1

*********************************************/

namespace TempName{
    using System;
    using System.Linq;
    using System.Collections.Generic;
    using System.Reflection;
    using static System.Console;
    using static IOmacro.CSharpInput; 
    using static IOmacro.CppInput;
    using static IOmacro.CConst;

    public class CRun{
        public readonly char problem_num = 'A';
        
        public void solve_1() {
            
            var output = new string[2];
            output[0] = _string;
            output[1] = "";
            for (int i = 0; i < output[0].Length; i++) {
                output[1] = output[0][i] + output[1];
            }
            int query_num = 0;
            query_num = _int;
            short reverse = 0;
            
            for (int i = 0; i < query_num; i++) {
                var input = _string;
                if (input.Length <= 1) {
                    reverse ^= 1;
                }
                else {
                    string[] query = input.Split(' ').ToArray();
                    if (query[1] == "1") {
                        output[reverse] = query[2] + output[reverse];
                        output[reverse^1] = output[reverse^1] + query[2];
                    }
                    else if (query[1] == "2") {
                        output[reverse^1] = query[2] + output[reverse^1];
                        output[reverse] = output[reverse] + query[2];
                    }
                }
            }
            
            WriteLine(output[reverse]);
            
        }

        public void solve_2() {
            
        }

        public void solve_3() {
            
        }
    }
    
    class Program { 
        static void Main() { 
            var run = new CRun();
            if (run.problem_num == 'A') run.solve_1(); 
            if (run.problem_num == 'B') run.solve_2(); 
            if (run.problem_num == 'C') run.solve_3();
        } 
    }
}

namespace IOmacro {
    //20.05.08. 수정
    
    using System; 
    using System.Linq; 
    using System.IO;
    using System.Collections.Generic;
    
    public class CSharpInput {
        public static StreamWriter _writer = new StreamWriter(Console.OpenStandardOutput());
        public const char separator = ' ';
        public static string _string{get{return Console.ReadLine();}}
        public static string[] _stringa{get{return (Console.ReadLine().Split(separator));}}
        public static int _int{get{return int.Parse(Console.ReadLine());}}
        public static int[] _inta{get{return Console.ReadLine().Split(separator).Select(int.Parse).ToArray();}}
        public static long _long{get{return long.Parse(Console.ReadLine());}}
        public static long[] _longa{get{return Console.ReadLine().Split(separator).Select(long.Parse).ToArray();}}    
        public static double _double{get{return double.Parse(Console.ReadLine());}}
        public static double[] _doublea{get{return Console.ReadLine().Split(separator).Select(double.Parse).ToArray();}}    
    }
    
    public class CConst {
        public static readonly int MINI = int.MaxValue;
        public static readonly long INF = Int64.MaxValue;
    }
    
    public class CppInput {
        public static CppInput cin => new CppInput();
        public const char separator = ' ';
        private static readonly Queue<string> _input = new Queue<string>();
        private CppInput(){}
        public static implicit operator string(CppInput _) {
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return _input.Dequeue();
        }
        public static implicit operator int(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return int.Parse(_input.Dequeue());
        }
        public static implicit operator long(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return long.Parse(_input.Dequeue());
        }
        public static implicit operator double(CppInput _){
            if (_input.Count == 0) Console.ReadLine().Split(separator).foreachExtension(x => _input.Enqueue(x));
            return double.Parse(_input.Dequeue());
        }
    }
    
    public static class EnumerableExtension {
        public delegate void Function<in T>(T val);
        public static void foreachExtension<T>(this IEnumerable<T> enumerable, Function<T> function) {
            foreach (var x in enumerable) function(x);
        }
    }
}