Problem: Nezzar designs a brand new game "Hidden Permutations" and shares it with his best friend, Nanako.

At the beginning of the game, Nanako and Nezzar both know integers n and m. The game goes in the following way:

  * Firstly, Nezzar hides two permutations p_1,p_2,…,p_n and q_1,q_2,…,q_n of integers from 1 to n, and Nanako secretly selects m unordered pairs (l_1,r_1),(l_2,r_2),…,(l_m,r_m); 
  * After that, Nanako sends his chosen pairs to Nezzar; 
  * On receiving those m unordered pairs, Nezzar checks if there exists 1 ≤ i ≤ m, such that (p_{l_i}-p_{r_i}) and (q_{l_i}-q_{r_i}) have different signs. If so, Nezzar instantly loses the game and gets a score of -1. Otherwise, the score Nezzar gets is equal to the number of indices 1 ≤ i ≤ n such that p_i ≠ q_i. 



However, Nezzar accidentally knows Nanako's unordered pairs and decides to take advantage of them. Please help Nezzar find out two permutations p and q such that the score is maximized.

Input

The first line contains a single integer t (1 ≤ t ≤ 5 ⋅ 10^5) — the number of test cases.

The first line of each test case contains two integers n,m (1 ≤ n ≤ 5 ⋅ 10^5, 0 ≤ m ≤ min((n(n-1))/(2),5 ⋅ 10^5)). 

Then m lines follow, i-th of them contains two integers l_i,r_i (1 ≤ l_i,r_i ≤ n, l_i ≠ r_i), describing the i-th unordered pair Nanako chooses. It is guaranteed that all m unordered pairs are distinct.

It is guaranteed that the sum of n for all test cases does not exceed 5 ⋅ 10^5, and the sum of m for all test cases does not exceed 5⋅ 10^5.

Output

For each test case, print two permutations p_1,p_2,…,p_n and q_1,q_2,…,q_n such that the score Nezzar gets is maximized.

Example

Input


3
4 2
1 2
3 4
6 4
1 2
1 3
3 5
3 6
2 1
1 2


Output


1 2 3 4
3 4 1 2
2 3 4 1 6 5
1 4 3 2 5 6
1 2
1 2

Note

For first test case, for each pair given by Nanako:

  * for the first pair (1,2): p_1 - p_2 = 1 - 2 = -1, q_1 - q_2 = 3 - 4 = -1, they have the same sign; 
  * for the second pair (3,4): p_3 - p_4 = 3 - 4 = -1, q_3 - q_4 = 1 - 2 = -1, they have the same sign. 



As Nezzar does not lose instantly, Nezzar gains the score of 4 as p_i ≠ q_i for all 1 ≤ i ≤ 4. Obviously, it is the maximum possible score Nezzar can get.

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;

typedef pair <int, int> pii;

int N, M;
vector <vector <int>> adj;
vector <int> deg;

void init() {
  deg = vector <int> (N + 1, 0);
  adj = vector <vector <int>> (N + 1, vector <int> ());
}

void add_edge(int u, int v) {
  adj[u].push_back(v);
  adj[v].push_back(u);
  deg[u]++;
  deg[v]++;
}

void load() {
  scanf("%d%d", &N, &M);
  init();
  while (M--) {
    int l, r;
    scanf("%d%d", &l, &r);
    add_edge(l, r);
  }
}

void solve() {
  vector <bool> done(N + 1);
  vector <bool> neighbour(N + 1);
  vector <pii> edges;
  for (int i = 1; i <= N; i++) {
    if (done[i] || deg[i] == N - 1)
      continue;
    adj[i].push_back(i);
    for (auto it : adj[i])
      neighbour[it] = true;
    int mex = 1;
    while (neighbour[mex])
      mex++;
    for (auto it : adj[i])
      neighbour[it] = false;
    done[i] = done[mex] = true;
    edges.push_back({i, mex});
  }
  init();
  for (auto it : edges)
    add_edge(it.first, it.second);
  vector <pii> stars;
  for (auto it : edges) 
    if (deg[it.first] > 1 && deg[it.second] > 1) {
      deg[it.first]--;
      deg[it.second]--;
    }
    else 
      stars.push_back(it);
  init();
  for (auto it : stars) 
    add_edge(it.first, it.second);
  int curr = 1;
  vector <int> p(N + 1), q(N + 1);
  for (int i = 1; i <= N; i++) {
    bool check = true;
    for (auto it : adj[i])
      check &= deg[it] == 1;
    if (check && !p[i]) {
      p[i] = curr;
      q[i] = curr + deg[i];
      for (int j = 0; j < deg[i]; j++) {
        p[adj[i][j]] = curr + j + 1;
        q[adj[i][j]] = curr + j;
      }
      curr += deg[i] + 1;
    }
  }
  for (int i = 1; i <= N; i++)
    if (!p[i]) 
      p[i] = q[i] = curr++;
  for (int i = 1; i <= N; i++)
    printf("%d ", p[i]);
  puts("");
  for (int i = 1; i <= N; i++)
    printf("%d ", q[i]);
  puts("");
}

int main() {
  int tc;
  scanf("%d", &tc);
  while (tc--) {
    load();
    solve();
  }
  return 0;
}