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.util.Scanner;

public class painting {

	private static Scanner input;

	public static void main(String[] args) {
		input = new Scanner(System.in);
		int n = input.nextInt();
		int k = input.nextInt();
		int arr[] = new int[n];
		for (int i = 0; i < n; i++) {
			arr[i] = input.nextInt();
		}

		int max = arr[0], min = arr[0];
		for (int i = 1; i < n; i++) {
			if (arr[i] > max)
				max = arr[i];
			if (arr[i] < min)
				min = arr[i];
		}
		if ((max - min) > k) {
			System.out.println("NO");
		} else {
			System.out.println("YES");
			for (int i = 0; i < n; i++) {
				int counter = 1;
				for (int j = 0; j < arr[i]; j++) {
					System.out.print(counter++);
					if (j < arr[i] - 1) {
						System.out.print(" ");
					}
					if (counter > k) {
						counter = 1;
					}
				}
				if(i<n-1){
					System.out.println();
				}
			}
		}
	}

}