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: Time Limit Exceeded)

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String S = sc.next();
        int Q = sc.nextInt();
        StringBuilder sb = new StringBuilder(S.length() + Q);
        sb.append(S);
        boolean flipped = false;
        for(int i=0; i<Q; i++) {
            String cmd = sc.next();
            if(cmd.equals("1")) {
                // filp
                flipped = !flipped;
            } else {
                String cmd2 = sc.next();
                String cmd3 = sc.next();
                // add
                switch(cmd2) {
                    case "1":
                        // add head
                        if(!flipped) {
                            sb.insert(0, cmd3);
                        } else {
                            sb.append(cmd3);
                        }
                        break;
                    case "2":
                        // add tail
                        if(!flipped) {
                            sb.append(cmd3);
                        } else {
                            sb.insert(0, cmd3);
                        }
                        break;
                }
            }
        }
        if(!flipped) {
            System.out.println(sb.toString());
        } else {
            System.out.println(sb.reverse().toString());
//            System.out.println(reverse(sb));
        }
    }

    static String reverse(StringBuilder sb) {
        StringBuilder result = new StringBuilder();
        for(int i=sb.length()-1; i>=0; i--) {
            result.append(sb.substring(i, i+1));
        }
        return result.toString();
    }
}