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 CPP):

Solution:
#include<bits/stdc++.h>

using namespace std;

#define ll long long
#define fr(n) for(ll i=0;i<n;i++)
#define frr(n) for(ll i=n;i>=0;i--)
#define nl printf("\n")
#define debug(arr,n) for(int i=0; i<n; i++) printf("%lld ", arr[i])
#define debugr(arr,s,e) for(int i=s; i<=e; i++) printf("%lld ", arr[i])

int main(){
    ll n,q;
    cin>>n>>q;
    vector<queue<int>>qu(n);
    while(q--){
        ll a,t,x;
        cin>>a;
        if(a==0){
            cin>>t>>x;
            qu[t].push(x);
        }
        else if(a==1){
            cin>>t;
            if(!qu[t].empty()) cout<<qu[t].front()<<endl;
        }
        else{
            cin>>t;
            if(!qu[t].empty()) qu[t].pop();
        }
    }
    return 0;
}