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: Wrong Answer)

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {
    private static int MOD = 1000000007;

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.nextLine();
        int q = Integer.parseInt(sc.nextLine());

        StringBuilder h = new StringBuilder();
        StringBuilder t = new StringBuilder();
        List<String> heads = new ArrayList<>();
        List<String> tails = new ArrayList<>();

        boolean v = true;
        for (int i = 0; i < q; i++) {
            String line = sc.nextLine();
            if (line.startsWith("1")) {
                v = !v;
            } else {
                String[] split = line.split(" ");
                String c = split[2];
                if (split[1].equals("1")) { // add C to head
                    if (v) {
                        h.append(c);
//                        heads.add(c);
                    } else {
                        t.append(c);
//                        tails.add(c);
                    }
                } else {  // add C to tail
                    if (v) {
                        t.append(c);
//                        tails.add(c);
                    } else {
                        h.append(c);
//                        heads.add(c);
                    }
                }
            }
        }

        if (v) {
//            StringBuilder out = new StringBuilder();
//            for (String head : heads) {
//                out.insert(0, head);
//            }
//            StringBuilder outt = new StringBuilder();
//            for (String tail : tails) {
//                outt.append(tail);
//            }
//            System.out.println(out.toString() + s + outt.toString());
            System.out.println(h.reverse().toString() + s + h.toString());
        } else {
//            StringBuilder out = new StringBuilder();
//            for (String head : heads) {
//                out.append(head);
//            }
//            StringBuilder outt = new StringBuilder();
//            for (String tail : tails) {
//                outt.insert(0, tail);
//            }
//            System.out.println(outt.toString()
//                    + new StringBuffer(s).reverse().toString() + out.toString());
            System.out.println(t.reverse().toString() + s + h.toString());
        }
    }
}