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: Accepted)

object Main extends App {
	var S = scala.io.StdIn.readLine.toList.map(_.toString)
	val q = scala.io.StdIn.readInt

	var front = List[String]()
	var back  = List[String]()

	var reverse_flag = false

	for(i<-0 until q){
		val a = scala.io.StdIn.readLine.split(" ")

		if(a(0).toInt == 1){
			reverse_flag = !reverse_flag
		}else{

			if(reverse_flag){
				if(a(1).toInt == 2) front = a(2) :: front
				else back = a(2) :: back
			}else{
				if(a(1).toInt == 1) front = a(2) :: front
				else back = a(2) :: back				
			}
		}
	}

	val frontString = front.mkString
	val SString     = S.mkString
	val backString  = back.mkString.reverse

	val ans = frontString + SString + backString

	if(reverse_flag){
		println(ans.reverse)
	}else{
		println(ans)
	}

}