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 Scala (2.11.7) (judge verdict: Time Limit Exceeded)

import java.util.Scanner

sealed trait Query
case object Reverse extends Query
case class Prepend(c: String) extends Query
case class Append(c: String) extends Query

object Main extends App {
  val sc = new Scanner(System.in)
  val s = sc.nextLine
  val q = sc.nextInt
  val queries = List.fill(q) {
    if (sc.nextInt == 1) Reverse
    else
      if (sc.nextInt == 1) Prepend(sc.next)
      else Append(sc.next)
  }

  @scala.annotation.tailrec
  def f(a: List[Query]): List[Query] = {
    a match {
      case Reverse +: Reverse +: tail => f(tail)
      case _ => a
    }
  }

  lazy val str = f(queries).foldLeft(s)((z, query) => {
    query match {
      case Reverse => z.reverse
      case Prepend(c) => c + z
      case Append(c) => z + c
    }
  })

  println(str)
}