#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(void){
	int count = 0;
	scanf("%d",&count);
	int divide = 0;
	scanf("%d",&divide);
	
	int tmp = 0;
	if(count % divide == 0){
		tmp = count / divide;
	}else{
		tmp = (count / divide) + 1;
	}
	int val[tmp][divide];
	
	int k = 0;
	for(int i = 0;i < tmp;i++){
		for(int j = 0;j < divide;j++){
			if(k < count){
				scanf("%d",&val[i][j]);
				printf("%d ",val[i][j]);	
			}
			k++;
		}
		printf("\n");
	}
}