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 PYTHON3):

Solution:
def paint(number_of_piles, number_of_colors, pebbles_for_piles):
    min_num_pebbles = min(pebbles_for_piles)
    max_num_pebbles = max(pebbles_for_piles)
    if (max_num_pebbles - min_num_pebbles) > number_of_colors:
        print("NO")
    else:
        print("YES")
        for i in range(number_of_piles):
            current_colors = []
            last = 0
            for j in range(pebbles_for_piles[i]-1):
                current_colors.append(j%number_of_colors + 1)
                last += 1
            current_colors.append(last%number_of_colors + 1)
            print(" ".join(map(str, current_colors)))

number_of_piles, number_of_colors = list(map(int, input().split()))
pebbles_for_piles = list(map(int, input().split()))

paint(number_of_piles, number_of_colors, pebbles_for_piles)