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 PHP7 (7.0.15) (judge verdict: Time Limit Exceeded)

<?php
fscanf(STDIN, "%s", $S);
fscanf(STDIN, "%d", $Q);

// 反転フラグ
$reverse = false;

// 配列
$strList = [];
$strList = array_fill(0, 1000000 * 2, '');
$idx1 = 1000000 - 1;
$idx2 = 1000000;

for($i = 0; $i < strlen($S); $i++) {
	$strList[$idx2] = $S[$i];
	$idx2++;
}

for($i = 0; $i < $Q; $i++) {
	// query入力
	$query = trim(fgets(STDIN));
	$list = explode(" ", $query);
	
	if($list[0] == "1") {
		$reverse = !$reverse;
	}
	else {
		if(($list[1] == "1" && $reverse == false) || ($list[1] != "1" && $reverse != false)) {
			$strList[$idx1] = $list[2];
			$idx1--;
		}
		else {
			$strList[$idx2] = $list[2];
			$idx2++;
		}
	}
}
 
$S = "";
if($reverse) {
	for($i = $idx2 - 1; $i > $idx1; $i--) {
		$S = $S . $strList[$i];
	}
}
else {
	for($i = $idx1 + 1; $i < $idx2; $i++) {
		$S = $S . $strList[$i];
	}
}
 
echo "{$S}\n";