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 N = 55, M = 2e4 + 5, inf = 0x3f3f3f3f, mod = 1e9 + 7;
int n, a[N], b[N];
vector<int> ans[N];
void fun(int tot) {
  int k = n, cnt = 0;
  for (int i = ans[tot].size() - 1; ~i; i--) {
    for (int j = k - ans[tot][i] + 1; j <= k; j++) b[++cnt] = a[j];
    k -= ans[tot][i];
  }
  for (int i = 1; i <= n; i++) a[i] = b[i];
}
int solve() {
  int l = 1, r = n, flag = n % 2, tot = 0, k;
  while (l <= r) {
    k = flag ? l : r;
    ans[tot].clear();
    for (int i = 1; i <= n; i++) {
      if (a[i] < l || a[i] > r)
        ans[tot].push_back(1);
      else {
        int j = i, pos;
        for (; j <= n && a[j] >= l && a[j] <= r; j++)
          if (a[j] == k) pos = j;
        if (pos != i) ans[tot].push_back(pos - i);
        ans[tot].push_back(j - pos);
        i = j - 1;
      }
    }
    if (flag)
      l++;
    else
      r--;
    flag ^= 1;
    if (ans[tot].size() > 1) {
      fun(tot);
      tot++;
    }
  }
  return tot;
}
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) scanf("%d", &a[i]);
  int tot = solve();
  printf("%d\n", tot);
  for (int i = 0; i < tot; i++) {
    printf("%d", ans[i].size());
    for (auto j : ans[i]) printf(" %d", j);
    printf("\n");
  }
  return 0;
}