#include <stdio.h>

int main(void) {
	int i, j;
	int m[14] = {1,2,3,4,5,6,7,8,9,10,11,12,13,14};
	
	for(i = 0; i < 7; i++)
		for(j = 0; j < 2; j++){
		  if(i > 0 && j%2 == 0)
			printf("\n");
		  
		  printf("%d ", m[i*2 + j]);
		}
		
	return 0;
}