Problem: You are given a deck of n cards numbered from 1 to n (not necessarily in this order in the deck). You have to sort the deck by repeating the following operation. 

  * Choose 2 ≤ k ≤ n and split the deck in k nonempty contiguous parts D_1, D_2,..., D_k (D_1 contains the first |D_1| cards of the deck, D_2 contains the following |D_2| cards and so on). Then reverse the order of the parts, transforming the deck into D_k, D_{k-1}, ..., D_2, D_1 (so, the first |D_k| cards of the new deck are D_k, the following |D_{k-1}| cards are D_{k-1} and so on). The internal order of each packet of cards D_i is unchanged by the operation. 



You have to obtain a sorted deck (i.e., a deck where the first card is 1, the second is 2 and so on) performing at most n operations. It can be proven that it is always possible to sort the deck performing at most n operations.

Examples of operation: The following are three examples of valid operations (on three decks with different sizes). 

  * If the deck is [3 6 2 1 4 5 7] (so 3 is the first card and 7 is the last card), we may apply the operation with k=4 and D_1=[3 6], D_2=[2 1 4], D_3=[5], D_4=[7]. Doing so, the deck becomes [7 5 2 1 4 3 6]. 
  * If the deck is [3 1 2], we may apply the operation with k=3 and D_1=[3], D_2=[1], D_3=[2]. Doing so, the deck becomes [2 1 3]. 
  * If the deck is [5 1 2 4 3 6], we may apply the operation with k=2 and D_1=[5 1], D_2=[2 4 3 6]. Doing so, the deck becomes [2 4 3 6 5 1]. 

Input

The first line of the input contains one integer n (1≤ n≤ 52) — the number of cards in the deck.

The second line contains n integers c_1, c_2, ..., c_n — the cards in the deck. The first card is c_1, the second is c_2 and so on.

It is guaranteed that for all i=1,...,n there is exactly one j∈\{1,...,n\} such that c_j = i.

Output

On the first line, print the number q of operations you perform (it must hold 0≤ q≤ n).

Then, print q lines, each describing one operation.

To describe an operation, print on a single line the number k of parts you are going to split the deck in, followed by the size of the k parts: |D_1|, |D_2|, ... , |D_k|. 

It must hold 2≤ k≤ n, and |D_i|≥ 1 for all i=1,...,k, and |D_1|+|D_2|+⋅⋅⋅ + |D_k| = n.

It can be proven that it is always possible to sort the deck performing at most n operations. If there are several ways to sort the deck you can output any of them.

Examples

Input


4
3 1 2 4


Output


2
3 1 2 1
2 1 3


Input


6
6 5 4 3 2 1


Output


1
6 1 1 1 1 1 1


Input


1
1


Output


0

Note

Explanation of the first testcase: Initially the deck is [3 1 2 4]. 

  * The first operation splits the deck as [(3) (1 2) (4)] and then transforms it into [4 1 2 3]. 
  * The second operation splits the deck as [(4) (1 2 3)] and then transforms it into [1 2 3 4]. 

Explanation of the second testcase: Initially the deck is [6 5 4 3 2 1]. 

  * The first (and only) operation splits the deck as [(6) (5) (4) (3) (2) (1)] and then transforms it into [1 2 3 4 5 6]. 

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const int inf = 1e9;
const long long inf64 = 1e18;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin >> n;
  vector<int> c(n);
  for (int i = 0; i < n; i++) cin >> c[i];
  vector<vector<int>> blocks(n), nblocks;
  for (int i = 0; i < n; i++) blocks[i] = {c[i]};
  vector<vector<int>> res;
  while (1) {
    nblocks.clear();
    for (int i = 0; i < (int)blocks.size(); i++) {
      if (!nblocks.empty() && nblocks.back().back() + 1 == blocks[i].front()) {
        for (auto x : blocks[i]) nblocks.back().push_back(x);
      } else {
        nblocks.push_back(blocks[i]);
      }
    }
    blocks = nblocks;
    if ((int)blocks.size() == 1) break;
    int ok = 0;
    for (int i = 0; i < (int)blocks.size() && !ok; i++) {
      for (int j = i + 1; j < (int)blocks.size() && !ok; j++) {
        if (blocks[j].back() + 1 == blocks[i].front()) {
          ok = 1;
          int L = 0, R = 0, M = 0;
          for (int q = 0; q < (int)blocks.size(); q++) {
            if (q == i || q == j) continue;
            if (q < i)
              L += blocks[q].size();
            else if (q > j)
              R += blocks[q].size();
            else
              M += blocks[q].size();
          }
          res.push_back(
              {L, (int)blocks[i].size(), M + (int)blocks[j].size(), R});
          nblocks.clear();
          for (int q = j + 1; q < (int)blocks.size(); q++)
            nblocks.push_back(blocks[q]);
          for (int q = i + 1; q <= j; q++) nblocks.push_back(blocks[q]);
          for (auto x : blocks[i]) nblocks.back().push_back(x);
          for (int q = 0; q < i; q++) nblocks.push_back(blocks[q]);
          blocks = nblocks;
        }
      }
    }
  }
  cout << (int)res.size() << "\n";
  for (auto row : res) {
    vector<int> hlp;
    for (auto x : row)
      if (x) hlp.push_back(x);
    cout << (int)hlp.size() << " ";
    for (auto x : hlp) cout << x << " ";
    cout << "\n";
  }
  return 0;
}