Problem: Queue is a container of elements that are inserted and deleted according to FIFO (First In First Out).

For $n$ queues $Q_i$ ($i = 0, 1, ..., n-1$), perform a sequence of the following operations.

* enqueue($t$, $x$): Insert an integer $x$ to $Q_t$.
* front($t$): Report the value which should be deleted next from $Q_t$. If $Q_t$ is empty, do nothing.
* dequeue($t$): Delete an element from $Q_t$. If $Q_t$ is empty, do nothing.



In the initial state, all queues are empty.

Constraints

* $1 \leq n \leq 1,000$
* $1 \leq q \leq 200,000$
* $-1,000,000,000 \leq x \leq 1,000,000,000$

Input

The input is given in the following format.


$n \; q$
$query_1$
$query_2$
:
$query_q$


Each query $query_i$ is given by


0 $t$ $x$


or


1 $t$


or


2 $t$


where the first digits 0, 1 and 2 represent enqueue, front and dequeue operations respectively.

Output

For each front operation, print an integer in a line.

Example

Input

3 9
0 0 1
0 0 2
0 0 3
0 2 4
0 2 5
1 0
1 2
2 0
1 0


Output

1
4
2

Solution (in JAVA):

Solution:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Stack;

public class Main {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String[] tmpArray = br.readLine().split(" ");
		int n = Integer.parseInt(tmpArray[0]);
		int q = Integer.parseInt(tmpArray[1]);

		@SuppressWarnings("unchecked")
		ArrayList<Integer>[] queue = new ArrayList[n];
		for(int i = 0; i < n; i++){
			queue[i] = new ArrayList<Integer>();
		}

		for(int i = 0; i < q; i++){
			tmpArray = br.readLine().split(" ");

			//enqueue
			if(tmpArray[0].equals("0")){
				int t = Integer.parseInt(tmpArray[1]);
				int x = Integer.parseInt(tmpArray[2]);

				queue[t].add(x);
			}
			//front
			else if(tmpArray[0].equals("1")){
				int t = Integer.parseInt(tmpArray[1]);

				if(!queue[t].isEmpty()){
					System.out.println(queue[t].get(0));
				}
			}
			//dequeue
			else {
				int t = Integer.parseInt(tmpArray[1]);

				if(!queue[t].isEmpty()){
					queue[t].remove(0);
				}
			}
		}

	}
}