// yukicoder: No.522 Make Test Cases(テストケースを作る)
// 2019.5.2 bal4u

#include <stdio.h>

#if 1
#define gc() getchar_unlocked()
#define pc(c) putchar_unlocked(c)
#else
#define gc() getchar()
#define pc(c) putchar(c)
#endif
int in()    // 非負整数の入力
{
	int n = 0, c = gc();
	do n = 10 * n + (c & 0xf), c = gc(); while (c >= '0');
	return n;
}

void out(int n)  // 正整数の表示（出力）
{
	int i;
	char b[20];

	i = 0; while (n) b[i++] = n % 10 + '0', n /= 10;
	while (i--) pc(b[i]);
}

int main()
{
	int N, a, b, c, aa, bb;

	N = in();
	aa = N/3; for (a = 1; a <= aa; a++) {
		b = a, c = N - (a<<1);
		while (c >= b) {
			out(a), pc(' '), out(b), pc(' '), out(c), pc('\n');
			b++, c--;
		}
	}
	return 0;
}