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 Java8 (OpenJDK 1.8.0) (judge verdict: Runtime Error)

import java.util.*;
import java.math.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    String S = sc.next();
    int Q = sc.nextInt();
    int[] T = new int[Q];
    int[] F = new int[Q];
    char[] C = new char[Q];
    for (int i = 0; i < Q; i++) {
      T[i] = sc.nextInt();
      if (T[i] == 2) {
        F[i] = sc.nextInt();
        C[i] = sc.next().charAt(0);
      }
    }
    sc.close();

    char[] pre = new char[Q];
    char[] suf = new char[Q];
    int preB = Q - 1;
    int sufE = 0;

    boolean rev = false;
    for (int i = 0; i < Q; i++) {
      if (T[i] == 1) {
        rev = rev ? false : true;
      } else if (T[i] == 2) {

        if (F[i] == 1) {
          if (rev) {
            suf[sufE++] = C[i];
          } else {
            pre[preB--] = C[i];
          }
        } else if (F[i] == 2) {
          if (rev) {
            pre[preB--] = C[i];
          } else {
            suf[sufE++] = C[i];
          }
        }
      }
    }

    StringBuilder ans = new StringBuilder()
        .append(pre, preB, pre.length - preB)
        .append(S)
        .append(suf, 0, sufE)
        ;
    if (rev)
      ans.reverse();
    System.out.println(ans);
  }
}