Problem: For $n$ lists $L_i$ $(i = 0, 1, ..., n-1)$, perform a sequence of the following operations.

* insert($t$, $x$): Insert an integer $x$ at the end of $L_t$.
* dump($t$): Print all elements in $L_t$.
* splice($s$, $t$): Transfer elements of $L_s$ to the end of $L_t$. $L_s$ becomes empty.



In the initial state, $L_i$ $(i = 0, 1, ..., n-1)$ are empty.

Constraints

* $1 \leq n \leq 1,000$
* $1 \leq q \leq 500,000$
* For a splice operation, $s \ne t$
* For a splice operation, $L_s$ is not empty
* The total number of elements printed by dump operations do not exceed 1,000,000
* $-1,000,000,000 \leq x \leq 1,000,000,000$

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 $s$ $t$


where the first digits 0, 1 and 2 represent insert, dump and splice operations respectively.

Output

For each dump operation, print elements of the corresponding list in a line. Separete adjacency elements by a space character (do not print the space after the last element). Note that, if the list is empty, an empty line should be printed.

Example

Input

3 10
0 0 1
0 0 2
0 0 3
0 1 4
0 1 5
2 1 0
0 2 6
1 0
1 1
1 2


Output

1 2 3 4 5

6

Solution (in CPP):

Solution:
#include <iostream>
#include <list>
#include <vector>
using namespace std;
enum Query
{
    insert = 0,
    dump = 1,
    splice = 2,
};
std::istream &operator>>(std::istream &is, Query &i)
{
    int tmp;
    if (is >> tmp)
        i = static_cast<Query>(tmp);
    return is;
} //オペレーターオーバーロード
void dump_list(list<int> L)
{
    //auto 具体的な型書かなくても右側で判別してくれる
    if (!L.empty())
    {
        cout << *L.begin();
        for (auto it = ++L.begin(); it != L.end(); it++)
        {
            cout << ' ' << *it;
        }
    }
    cout << endl;
}
int main()
{
    typedef list<int> ls;
    int n;
    cin >> n;

    vector<ls> L(n);

    int q;
    cin >> q;

    for (int i = 0; i < q; i++)
    {
        Query query;
        cin >> query;

        if (query == insert)
        {
            int t, x;
            cin >> t >> x;
            L.at(t).push_back(x);
        }
        if (query == dump)
        {
            int t;
            cin >> t;
            dump_list(L.at(t));
        }
        if (query == splice)
        {
            int s, t;
            cin >> s >> t;
            L.at(t).splice(L.at(t).end(), L.at(s));
        }
    }
}
//moveとは