# coding: utf-8
import array, bisect, collections, copy, heapq, itertools, math, random, re, string, sys, time
sys.setrecursionlimit(10 ** 7)
INF = 10 ** 20
MOD = 10 ** 9 + 7


def II(): return int(input())
def ILI(): return list(map(int, input().split()))
def IAI(LINE): return [ILI() for __ in range(LINE)]
def IDI(): return {key: value for key, value in ILI()}


def read():
    N = II()
    return (N,)


def solve(N):
    ans = []
    for a in range(1, N // 3 + 1):
        for b in range(a, (N - a) // 2 + 1):
            c = N - a - b
            ans.append((a, b, c))
    return ans


def main():
    params = read()
    ans = solve(*params)
    for a in ans:
        print("{} {} {}".format(*a))


if __name__ == "__main__":
    main()