One day Ms Swan bought an orange in a shop. The orange consisted of *n*·*k* segments, numbered with integers from 1 to *n*·*k*. 

There were *k* children waiting for Ms Swan at home. The children have recently learned about the orange and they decided to divide it between them. For that each child took a piece of paper and wrote the number of the segment that he would like to get: the *i*-th (1 ≤ *i* ≤ *k*) child wrote the number *a*<sub class="lower-index">*i*</sub> (1 ≤ *a*<sub class="lower-index">*i*</sub> ≤ *n*·*k*). All numbers *a*<sub class="lower-index">*i*</sub> accidentally turned out to be different.

Now the children wonder, how to divide the orange so as to meet these conditions:
 -  each child gets exactly *n* orange segments; -  the *i*-th child gets the segment with number *a*<sub class="lower-index">*i*</sub> for sure; -  no segment goes to two children simultaneously. 
Help the children, divide the orange and fulfill the requirements, described above.
The first line contains two integers *n*, *k* (1 ≤ *n*, *k* ≤ 30). The second line contains *k* space-separated integers *a*<sub class="lower-index">1</sub>, *a*<sub class="lower-index">2</sub>, ..., *a*<sub class="lower-index">*k*</sub> (1 ≤ *a*<sub class="lower-index">*i*</sub> ≤ *n*·*k*), where *a*<sub class="lower-index">*i*</sub> is the number of the orange segment that the *i*-th child would like to get.

It is guaranteed that all numbers *a*<sub class="lower-index">*i*</sub> are distinct.
from collections import Counter

class Task:
	n = 0
	k = 0
	special = []
	answer = []
	
	def getData(self):
		self.n, self.k = [int(x) for x in input().split()]
		self.special = [int(x) for x in input().split()]
	
	def solve(self):
		numbers = [i for i in range(1, self.n * self.k + 1)]
		numbers = [x for x in numbers if x not in self.special]
		self.answer = [numbers[i : i + self.n - 1] for i in range(0, self.k)]
		for i in range(0, self.k):
			self.answer[i] += [self.special[i]]
	
	def printAnswer(self):
		for child in self.answer:
			current_line = ""
			for element in child:
				current_line += str(element) + " "
			print(current_line)


task = Task();
task.getData();
task.solve();
task.printAnswer();
