Problem: There are n piles of pebbles on the table, the i-th pile contains ai pebbles. Your task is to paint each pebble using one of the k given colors so that for each color c and any two piles i and j the difference between the number of pebbles of color c in pile i and number of pebbles of color c in pile j is at most one.

In other words, let's say that bi, c is the number of pebbles of color c in the i-th pile. Then for any 1 ≤ c ≤ k, 1 ≤ i, j ≤ n the following condition must be satisfied |bi, c - bj, c| ≤ 1. It isn't necessary to use all k colors: if color c hasn't been used in pile i, then bi, c is considered to be zero.

Input

The first line of the input contains positive integers n and k (1 ≤ n, k ≤ 100), separated by a space — the number of piles and the number of colors respectively.

The second line contains n positive integers a1, a2, ..., an (1 ≤ ai ≤ 100) denoting number of pebbles in each of the piles.

Output

If there is no way to paint the pebbles satisfying the given condition, output "NO" (without quotes) .

Otherwise in the first line output "YES" (without quotes). Then n lines should follow, the i-th of them should contain ai space-separated integers. j-th (1 ≤ j ≤ ai) of these integers should be equal to the color of the j-th pebble in the i-th pile. If there are several possible answers, you may output any of them.

Examples

Input

4 4
1 2 3 4


Output

YES
1
1 4
1 2 4
1 2 3 4


Input

5 2
3 2 4 1 3


Output

NO


Input

5 4
3 2 4 3 5


Output

YES
1 2 3
1 3
1 2 3 4
1 3 4
1 1 2 3 4

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const int maxn = 1e6 + 11, inf = 1e9;
;
pair<int, int> a[105];
vector<int> ans[105];
int main() {
  int n, k;
  cin >> n >> k;
  for (int i = 1; i <= n; ++i) {
    cin >> a[i].first;
    a[i].second = i;
  }
  sort(a + 1, a + n + 1);
  if (a[n].first - a[1].first > k) {
    cout << "NO";
    return 0;
  }
  int m = a[1].first;
  for (int i = 1; i <= n; ++i) {
    a[i].first -= m;
    for (int j = 1; j <= m; ++j) ans[a[i].second].push_back(1);
  }
  for (int i = 1; i <= k; ++i) {
    for (int j = 1; j <= n; ++j) {
      if (a[j].first > 0) {
        ans[a[j].second].push_back(i);
        a[j].first--;
      }
    }
  }
  cout << "YES" << endl;
  for (int i = 1; i <= n; ++i, cout << endl)
    for (int j = 0; j < ans[i].size(); ++j) cout << ans[i][j] << ' ';
  return 0;
}