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 JAVA):

Solution:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main
{
    public static void main(String[] args) throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String[] tmp = br.readLine().split("\\s+");
        int n = Integer.parseInt(tmp[0]), m = Integer.parseInt(tmp[1]);
        int max = Integer.MIN_VALUE, min = Integer.MAX_VALUE;
        tmp = br.readLine().split(" ");
        for (int i = 0; i < n; ++i)
        {
            int j = Integer.parseInt(tmp[i]);
            max = Math.max(max, j);
            min = Math.min(min, j);
        }
        if (max - min <= m)
            System.out.println("YES");
        else
        {
            System.out.println("NO");
            return;
        }

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < n; ++i)
        {
            int k = Integer.parseInt(tmp[i]);
            for (int j = 0; j < k; ++j)
            {
                sb.append(((j % m) + 1));
                if (j != k - 1)
                    sb.append(" ");
            }
            sb.append("\n");
        }
        System.out.print(sb);
    }
}