#include <bits/stdc++.h>
#define gcu getchar_unlocked
#define pcu putc_unlocked
#define all(x) x.begin(),x.end()
#define endln() pcu('\n',stdout)
#define space() pcu(' ',stdout)
using namespace std;
int iin(){int r=0,s=1;int c=gcu();while(isspace(c))c=gcu();if(c=='-'){s=-1;c=gcu();}for(;!isspace(c);c=gcu())r=r*10+(c-'0');ungetc(c,stdin);return s*r;}
void iout(int n){if(n<0){pcu('-',stdout);n=-n;}if(n<10){pcu('0'+n,stdout);return;}int i;char b[21];b[20]=0;for(i=20;n>0;b[--i]='0'+n%10,n/=10);fputs(b+i,stdout);}

int main() {
	int n = iin();
	for (int i = 1; i <= n / 3; i++) {
		for (int j = i; j <= (n - i) / 2; j++) {
			iout(i); space(); iout(j); space(); iout(n - i - j); endln();
		}
	}
}